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It's Official the 2009 Chevy Corvette ZR1 puts out 638 HP!

2009_zr1_engine.jpg
GM officially unveiled the 2009 Chevy Corvette ZR1 at the Detroit Auto Show earlier this year, but at that time the automaker had yet finalize the certification of the 6.2L LS9 V8.

Three months later, GM is officially announcing that the ZR1 will put out 638 horsepower and 604 lb-ft. of torque from its 6.2L engine. That output is almost 103 horses per liter and is the most powerful automotive production engine that GM has ever built. The engine propels the Corvette to a top speed of over 200 mph. In addition to the extreme power, engineers also set a goal of the ZR1 being the most fuel-efficient 600+ horsepower car on the market.


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PRESS RELEASE:

CHEVROLET ANNOUNCES CERTIFIED POWER RATINGS FOR THE NEW CHEVROLET CORVETTE ZR1: 638 HP FROM THE SUPERCHARGED LS9 V-8

PONTIAC, Mich. – When it was introduced at the North American International Auto Show in Detroit earlier this year, the 2009 Chevrolet Corvette ZR1's power was estimated at 100 horsepower for each of its 6.2 liters of displacement. GM Powertrain has completed SAE certification of the ZR1's supercharged LS9 V-8 and the results exceed the estimate: 638 horsepower (476 kW) and 604 lb.-ft. of torque (819 Nm).

The LS9's output is nearly 103 horses per liter, or just about 1.7 horses for each of the engine's 376 cubic inches. It is unquestionably the most powerful automotive production engine ever manufactured by General Motors and enables the Corvette ZR1 to achieve a top speed of more than 200 mph (322 km/h).

"One of the most amazing things about the Corvette ZR1 is the level of refinement that our designers and engineers have attained. Even with all that power, this car has road manners that will allow our customers to enjoy it on the streets as a daily driver, and on the track," said Chevrolet General Manager Ed Peper.

The Corvette ZR1 goes on sale this summer. Its 638-hp supercharged engine is complemented in the chassis by heavy-duty components not offered in any other model, including a six-speed manual transmission with race-hardened gears and dual-disc clutch technology that delivers exceptional clamping power and lower inertia, as well as strengthened axle components.

Fuel economy testing has not been completed, but engineers are confident the ZR1 will be the most fuel-efficient 600-plus-horsepower car on the market.

The LS9 engine is hand-built by specially trained technicians at GM's Performance Build Center in Wixom, Mich. It is a unique, small-volume engine production facility that also builds the Chevrolet Corvette Z06's LS7 engine and other high-performance GM production engines.

"Developing the LS9 involved more than simply striving for a great horsepower number. Endurance and reliability testing have shown the engine to be robust and low-maintenance, just like other engines in the small-block family," said Sam Winegarden, executive director, engine engineering for GM Powertrain. "That it is distinguished as the most powerful engine ever from General Motors is a source of immense pride among everyone involved with the LS9."

Supercharged aspiration
The key enabler of the LS9's performance is the industry's first production application of a new, positive-displacement Roots-type supercharger that has a unique four-lobe rotor design. Its design promotes quieter and more efficient performance, while the large, 2.3-liter displacement ensures adequate air volume at high rpm. Maximum boost pressure is 10.5 psi (0.72 bar). It is teamed with an integrated charge cooling system that reduces inlet air temperature for maximum performance.

"The combination of large displacement and the new, four-rotor design broadens the effective range of the supercharger, allowing the engine to make more power at lower rpm and sustain it throughout the power band," said Winegarden. "The low-end torque is tremendous and the high-rpm charge from the supercharger is simply amazing."

A raised hood provides adequate clearance for the LS9, while a polycarbonate window in the hood provides a view of the engine beneath it.

LS9 details
The LS9 features many unique design and manufacturing details that support its high-performance nature. They include:
Aluminum cylinder block with iron cylinder liners that are finish-bored and honed with a deck plate installed
Forged steel crankshaft with a nine-bolt flange
Titanium connecting rods and forged aluminum pistons
Stronger, rotocast cylinder heads with 2.16-inch (55 mm) titanium intake valves and 1.59-inch (40.4 mm) hollow-stem, sodium-filled exhaust valves
Camshaft with 0.555-inch (14.1 mm) lift for excellent idle and low-speed driving qualities
A dry-sump oiling system with 10.5-quart (9.9 liters) capacity
Integrated oil cooler and piston-cooling oil squirters
Intercooler cover visible through the hood window that features ZR1-unique blue accents and "LS9 SUPERCHARGED" embossed on the left and right sides

Specifications

LS9 6.2L SUPERCHARGED V-8
Displacement (cu in / cc):
376 / 6162
Bore & stroke (in / mm):
4.06 x 3.62 / 103.25 x 92
Block material:
cast aluminum
Cylinder head material:
A356-T6 rotocast aluminum
Valvetrain:
overhead valve, 2 valves per cylinder
Fuel delivery:
SFI (sequential fuel injection)
Compression ratio:
9.1:1
Horsepower / kW:
638 / 476 @ 6500 rpm
Torque (lb-ft / Nm):
604 / 819 @ 3800 rpm
Fuel shut-off (rpm):
6600
Recommended fuel:
premium required
Exhaust manifolds:
stainless steel
Main bearing caps:
forged steel
Crankshaft:
forged steel
Camshaft:
hollow steel; 0.555-in (14.1 mm) lift
Connecting rods:
forged titanium
Valves:
intake: titanium
exhaust: hollow steel
Valve lifters:
hydraulic roller
Supercharger:
R2300, four-lobe "Roots" type (2.3L)
Additional features:
piston oil-spray cooling; direct-mount ignition coils; 11-rib accessory drive

Comments (66)

Noya:

"That output is almost 103 horses per liter"

As if that is something hard to do with forced induction.

Spoon:

103 horses per liter or not, its still a beast. The C6 z06 was a monster on the streets. This new one will be murder. Domestics are coming back with a vengeance. I've never respected Vettes until the C5 but man have they come up! This coming from a guy that drove a 460whp Evo IX and daily drives an S2000.

CKVCKV:

Amazing world-class performance and great exterior looks; even the Europeans respect this car.

The interior is a reminder that "cheap" is still something we in the U.S. don't mind paying a lot for. The instrument cluster looks like it was sourced from an after-market kit for $ 79.99.

Why does GM continue to do the Corvette interiors like a cheap econo-box ?


I love whining !


.

Noya:

"engineers also set a goal of the ZR1 being the most fuel-efficient 600+ horsepower car on the market."

No...they're just too cheap/stupid/avoiding taxes? to give the car proper gearing so it tops out in 6th gear like real exotics do. I'll be amazed if this thing doesn't come with two over drive gears like a Ford Fusion and the cheesy 1-4 skip shift.

Someone paying $100k+ for a car that rips to 60mph in 3.5sec and tops 200mph doesn't give a rats ass about fuel economy.

Wixer:

Thank god they only make these 'timeless' cars in the states. Lookit that interior 'pukes pukes'.
I seriously wonder how many corvettes are exported worldwide......or they are only catered for their own lilo domestic market?? 'USDM'?? rofl.

Wixer:

Thank god they only make these 'timeless' cars in the states. Lookit that interior 'pukes pukes'.
I seriously wonder how many corvettes are exported worldwide......or they are only catered for their own lilo domestic market?? 'USDM'?? rofl.

waldorf and statler:

not enough. i really need 800hp to get to the mall.
And with a topspeed 200mph, i'll be there in 3 seconds.

America-Obsessed:

Man this is Heaven!

American GM V8 engine, american symbol like "Corvette"...heaven!!!

I already see that my fellow "America Obsessed" didnt waste any time.

HP/Displacement talk...interiors talk...armchair engineering telling whats wrong with it...fuel efficiency talk...we are relentless!

We america-obsessed people are trully commited to our cause.

Joe:

All the rice burner fans are out criticizing instead of praising. This is a halo car and the Japanese have them, too. Although, I bet the rice burner fans don't criticize them. This new Corvette will be sold on a very limited scale and will be mostly for shows and racing. If it like the other new Corvette, it'll probably get great gas mileage.
Go GM go. Show the world you can build the best of any model cars with the best gas mileage. For those who don't know, GM is on it's way of cleaning up shop for gas mileage, starting from pickups to the smallest cars. Their pickup trucks gets the best in gas mileage. And recently, the Malibu and the Cobalt have won those bragging rights.

Mr.X:

Maybe they want to keep the interior cheap and the fuel consumption as low as possible?

I think it wouldn't be a problem for Chevrolet to build it with the quality of european cars, but then they'd possibly take $200k instead of $100k.

But that's the reason for buying a Corvette for a lot of people (even here in Europe/Germany).

Most of the owners take it out at the weekend and enjoy the performance of the engine, suspension, etc. Nobody cares about some bad materials in the interior on a 2 or 3h trip.

The fuel consumption is in my opinion very important for the marketing, too. Especially today with all the discusions about global warming.

American cars don't enjoy the best reputation in the world becouse of it's consumption. But if they could bring it down to the same level than the Europeans, the cars would get more attractive to everybody.

Particularly the Vette is praised to be a good vehicle for daily use.

And of course it feels a bit better to know my car guzzels only 15L instead of 30L even i could afford it.

Btw. the gas price in Germany is €1.55 per 1 litre of supreme that means about $9.15 per gallon at the moment. (no, it's not a mistake)

But i love Corvettes anyway (and i'd trade my Z06 off for a ZR-1, without hesitating if i could afford it) although the Porsche factory is just 20miles away from here.

Jason:

I was hoping to read the engine made this power naturally aspirated, that would have been cool.

Anyway, I don't understand why some of you guys are bashing this for fuel economy. C'mon, it's a sports car. Are we gonna start criticizing pick-up trucks because they take up too much space?

Sports cars are built for 2 reasons, performance and looks. The C6 has performance, and is halfway there in the looks department, so why not accomplish something else while the car is in R&D (such as a little better fuel economy)?

Let's say every car made 50mpg, went the same speed, and only looked differently. Wouldn't some of us say "screw a few mpg, make the car go faster'"?

Cheap Car Lover:

I still have more respect for the Viper's engine because I love N/A. It gets 20mpg average in the viper, so this one will have to be pretty efficient.

Z:

Wow! 103hp per liter with a compressor, nice achievement GM!

I don't see why they try to show off with sucky specs as this one when in reality the car is a beast and one the best vettes yet.

Wow!:

"Wow! 103hp per liter with a compressor, nice achievement GM!"

Wow! Another guy that doesnt know what a pushrod engine is and still doesnt realise the hp-per-liter value is useless...

reality:

The Acura RDX (Honda) engine is turbocharged and develops 240 HP from 2.3L, or 104 HP per litre.

I didn't know that 104 HP per litre is great for an engine with forced induction while 103 HP per litre is poor.

Honda must have some amazing technology to be able to get that extra 1 HP per litre from their engine.

Avatar:

Um, Noya, hate to break it to you, but the ZR1 tops out in sixth gear, not fifth like previous Vettes. The gearing is as follows: 1st 2.29; 2nd 1.61; 3rd 1.21; 4th 1.00; 5th 0.81; 6th 0.67; Final Drive 3.42

Gas mileage should be interesting. It will most likely be the most fuel efficient 600+ horse power car, but will it avoid the gas guzzler like the Z06? That would be a real accomplishment.

WVO:

The Most Fuel Efficient 600+ hp car on the market....oh, please, if it runs like its burning it.....and just how many 600+ hp cars ARE on the market?

If GM is really singing the fuel efficiency theme here, they could have reduced the hp a couple hundred and gained mpg. Made it a torque monster and geared a tall overdrive. A 35mpg Vette, 'magin that.

Gripe, gripe, gripe, whine, whine, whine.....just exactly what do yall think a decent interior IS????? Is that all you can complain about? I read these blogs and see if yall can't gripe about anything else, you fall back on a lousy interior (and you know who you are).

Europeans just don't understand (however I do feel sorry for you, all your cars look the same), in America, overkill is good for you. :)

Noya:

Avatar:

Im sorry but i just had to badmouth this because its american thats all.

I know i say the dumbest things but i cant resist, its the "america" thing you know?

America-Obsessed:

"Europeans just don't understand (however I do feel sorry for you, all your cars look the same), in America, overkill is good for you. :)"


Ohhh man...my fellow "America-Obsessed" comrades will love that statement!

Colt:

Reality:
Neither of those engines (the LS9 or K23A1 fromt the RDX) are that much of an accomplishment. For example:
F20C (Honda S2000): 100hp/L
B18C5 (Honda Integra Type R): 108.3 hp/L
note: the it-r was produced 1996 through 2001, its a 12 year old car!!!

I am in no way criticizing this corvette, its an incredible performance car, albeit a brute to drive. I'm just writing to those who think that 103 OR 104 hp/L is any type of an accomplishment with forced induction. It's not.

Colt:

Sorry, in my prev post I neglected to mention both of the honda engines are NA. No forced induction, and still getting 100+ hp/L. What if they threw a turbo or super on one of those?

Clue:

Colt:

HP/Liter = Engine good or bad?!?

You are clueless man...

Avatar:

Wait guys, there is more. Don't forget about the scared VTEC. 108 hp/L. Well, that 8.4L making 2.5 times the power gets 13/22 for mileage and weighs 3400 lbs. The 7.0L making 2 times the power gets 15/24 weighing 3200 lbs. And the VTEC, with 2.2L gets 18/25 weighing 2900 lbs?

But its ok guys, that 8.4L gets only 71 hp/L and that 7.0L gets 72 hp/L.

harryo:

Bragging rights are fine but when will GM produce quality cars for the rest of us?

Clue:

Avatar:

And dont forget this Von Braun´s still dont know what a pushrod engine is...

gary:

@colt:

B18C1 + 6PSI turbo = 240 whp or 260 flywheel. so yeah its quite a bit more efficient than either the K or L engines listed above.

Cheap Car Lover:

I've got a better stat for you 4 cylinder lovers.

The b series engines (Hondas civic/interga engines) weigh a little less than 300 pounds.

LS1 engines weigh roughly 450, so the ls9 will probably be closer to 500 with all the extra tubing and piping and supercharger and stuff.

That means the old type r integra puts out .66 hp/lb. Assuming the LS9 weighs 500 pounds it puts it at 1.276 hp/lb. The NA ls3 would be almost 1 hp/lb. Now, theres a metric that really matters! Holy crap?

Not to mention that ohv engines have a lower center of gravity over dohc. (good for handling)

S2000's average 21 mpg and are subject to a gas guzzler tax. Corvettes are not, and blow the doors off of the the S2000 (unless you're autocrossing).

High hp/liter doesn't really look so important or efficient anymore does it?

I used to have a GSR, and while it was fun to drive, it's not a sports car and not even remotely comprable to a Corvette (or an S2000 for that matter)

Mike M:

While I agree that too many people bash for the sake of bashing, and that no car will appeal completely to everyone, some valid points have been made above. First, the "most fuel-efficient 600-hp" car label is just stupid. I don't see many cars over 350 on the street, people who buy this don't care about gas mileage, and the gas mileage itself still sucks relative to our gas prices. Second, I think the point on cheap interior is valid. People seem to classify the Corvette as some sort of "affordable" sports car. It is not. The only people that will buy this car are the filthy rich, because they are the only ones that can afford to buy, maintain, and keep gas in it. It may cost much less than a Ferrari, but it definitely isn't in average salary worker territory. If someone like that buys one, they will be in financial trouble very shortly (like the people who bought all the houses they couldn't afford). In fact, these cars are probably bought up already at well above sticker price, just like the Ford did to kill our morale with the GT500. That being said, the people that can afford this would gladly pay a few thousand extra (chump change to them) for a nicer interior, as thsi car should have anyways. Some may do a custom interior anyways. Chevy did no favor to the working man by saving a few dollars on the sticker price (which is misleading as mentioned above) by using cheap interiors. Finally, for all the "little things" people don't like on the car, I'm sure aftermarket companies will be eager to listen and accomodate. For me, I'd be looking to have a new hood made without the window. Even though a majority of these cars will never be seen on the street, the few folks who actually drive these cars (and I respect them) will find that the window will look like crap shortly after. Aside from that, if I had the money, or was offered one, I would definitely take one;) Beautiful car, awesome performance, best Corvette.

Avatar:

Here is something else, adding onto what Cheap Car Lover touched on. Google the following image, Ford 5.0L vs 4.6L. On the left of that image is Ford's Modular 4.6L vs there old 5.0 on the right. DOHC engines not only generally weigh more then higher displacement OHV engines, but are also physically larger. For example, GM had to do a lot of interesting things to make the new 4.5L Duramax diesel fit where all the small blocks that they use fit. The engine uses a 72 degree block vs a typical 90 degree block to make it narrower. The exhaust manifold is in the valley with the turbo vs outside the block like typical engines. The intakes are directly on top of the cylinder heads vs in the valley.

Oh, I forgot to mention, this engine was developed completely in house by GM, despite having the DuraMax name attached to it. It is due out 2009 and rated for at least 310 hp and 520 ft-lbs of torque and expected to improve fuel efficiency by at least 25% over the Vortecs. It will also be 50 state legal.

Clinton Supporter:

i hear that hillary will not allow this car to go into production because GM hasent greased her palms enough in this election?

Gary:

@CCL:

Now add the huge transmission, 9 quarts of oil, and huge drive shafts to support the power and your metrics get all messed up. Besides the B series is old news and the K series has more displacement and wieghs less even with a 6 speed... Add 6psi of boost to a K20 and you'll see even better hp/ltr and hp/lb.

You are correct that the Integra doesn't compete with the Corvette though. However just the fact that people will and do compare it though says leagues for the little engines that could. I've run a couple of vets in my teg and let me tell you it's fun especially when you hit the twisties. No way I'd run one of these Vettes but a little more boost and I probably could.

Z:

@Wow! and Reality:

You seem to have missunderstood my point. I'm saying there's no point in trying to show off with "we have achieved 103hp per liter", and I'm not only refering to this article. GM has a good car here, so they should let the track times do the talking, cause I'm really not impressed by 103 forced hp per liter, some Volvo's and Saab's do that too ;P

Further, for you Honda bashers, the F20C creates 120hp per liter and it's NA - that's engineering.

And just to chip in on the pushrod conversation.. pushrods suck.

Zeeee:

M5 and M6 V10 DOHC engine: 529lb - 500hp
Viper V10 OHV: 548lb - 600 hp

Hp/Liter = Useless

Jason:

@Cheap Car Lover:

Who the hell measures an engine based on performance per weight? This isn't the 60's. *IF* we measured based on your ridiculous assumption, then a rotary engine would be the way of the future. Or perhaps a motorcycle engine. Either way, we all know some engines are built sturdier than others (read: heavier), yet can give the same amount of power output. Because it's heavier does it mean it's inferior? Because we all know a 1JZ is much sturdier than a 13B (they both give about 280hp from the factory). Is it fair then to compare an engine made of Iron and one of Aluminum?

Why don't we measure the engine according to color next? Or maybe next we can measure them based on sound... Either way, stop posting outdated non-sense.

Gary has the right idea.

snobfromeurope:

Ha! Ha! my Ferrari will run circles around that. American POS. Will fall apart at the track. Only for rich rednecks that won the lottery. Have fun at the Drag Strip (only thing its good at).

SlowandMellow:

Awesome video. Not sure what GM wants from the ZR-1. To make the fastest Vette ever, or the best sports car in the world (lmfao), or the cheapest (100k) sport scar, everyday driver with ridiculous performance specs, and respectable MPG, or what.

If reliable Hp/L is their goal, they can do better, because others have.

GM should sell the ZR-1 for 150k and do it right, and forget the useless trade-offs. Compete with the Ford GT.

It feels like a NASCAR (before it became internationalized) vs F1 debate. GM, gets input from Tony Stewart, F1/Ferrari gets input from Michael Shumacher.


Noya:

"Gripe, gripe, gripe, whine, whine, whine.....just exactly what do yall think a decent interior IS?????" - WVO


@ WVO

You just pointed it out in fact, the Lexus IS interior. The base IS 250 is less than $30k, and it's interior is 10x better than any Corvettes interior.


"M5 and M6 V10 DOHC engine: 529lb - 500hp
Viper V10 OHV: 548lb - 600 hp

Hp/Liter = Useless" - Zeeee


@ Zeeee

Not really. It tells you how "tuned" an engine is. The BMW V-10 is only 5.0L, while the Viper V-10 is 8.4L.
The BMW engine has a progressive, race car like power band that produces maximum HP right next to its 8,250rpm redline. This gives the car that classic sports car feel of more and more power as you push the engine harder, similar to Ferrari's and Lamborghini's.

To where the Viper V-10 is more like a truck engine, with massive TQ off idle and peak power at about 5,500rpm. While it's certainly capable (witnessed by it's performance stats and the old GTS racer), most people with money buy foreign sports cars for the above allure, nice interiors and newest/high technology, witnessed by the lagging sales of the Viper.

Avatar:

2.2L VTEC hp/lb = .73 14.4 Quarter Mile
M5/M6 hp/lb = .94 12.7/12.9
Viper hp/lb = 1.09 11.6
LS7 hp/lb = 1.10 11.7

How fast you are going is based on weight, power, and coefficient of drag. More power per weight, the faster you are going. More hp/L, you might be going fast, you might be going slow, you might be burning a ton of gas, you might be burning little gas, you might be reliable, you might break all the time. You can easily twin turbo a large displacement engine, and get it to have 1000+ hp at the wheels. Example, Lingenfelter makes 1100 hp to the rear wheels on pump gas. That is roughly 1294 hp at the crank assume 15% drive train loss. That is 184.86 hp/L. Now as for power to weight, that would be roughly 2.16 assuming the engine weighs 600 lbs. What is the fastest of the above group now? A quarter mile time of 9.5 for the Ligenfelter.

I will agree that the higher the hp/L, the higher the 'tune' is. At the same time, the less room for improvement. Thus, no replacement for displacement.

A better measurement would be hp/curb weight, but since we are strictly comparing engines, this is more meaningful then hp/L.

Tim:

ya the Honda V-Tec's are pretty ok (krappy) who wants 200hp and 150lb ft tq anyway. Go ahead and drive them who cares you'll never touch a vette anyway. The Japanese supercars are all but gone (3000gt VR4, 300zx TT, Supra, NSX) all except for the Skyline which will destroy a ZR1.... until it hit's it's gear limited top speed. The NSX is a great handling semi exotic. Every other car in the end your still only driving a Honda or Toyota.

What happens when you put a turbo or S/C on a Vtec BOOM timb bomb happens. Anyway's non of these cars have a S/C from the factory so you can't compare. Pull the S/C off the Vette and add turbos and you just gained close to 100hp at the same boost levels. ANY v-8 (German, Japanese, American) will ALWAYS destroy 4 or 6cyl cars. Don't be stupid.

bubba551:

Myth: American cars get lousy gas mileage.
Fact: No US or Asian manufacturer has ever failed to meet the CAFE standard, while most European manufacturers regularly pay CAFE civil penalties ranging from less than $1 million to more than $20 million annually.

Myth: hp/l is important since it translates into power-to-weight or mileage, or...
Fact: For a given vehicle, installing a v6 over a 4 cylinder adds 145-160lbs including the requisite cooling and brake upgrades. Adding a turbo to a 4cyl can add over 200lbs when you include the intercooler, cooling and brake upgrades. Fuel efficiency ends up favoring the v6 more often than not (on regular gas no less.)

Cheap Car Lover:

@ Jason

Of course it's a ridiculous comparison, I alluded to that in my post. I was responding to someone else's comparison of the LS9 and Type R because I thought it was ridiculous.

You talked about the FC20. It was suject to the gas guzzler tax and not competitive with a Corvette performance or MPG wise.

You're the only person I've ever heard of that doesn't think weight matters in a performance engine/car. Engine weight adds to curb weight, and any level headed person knows the less a car weighs the faster it is. Every reviewer in the world compares HP to weight of the car. I'm not really sure how weight will ever be "outdated".

I actually have a 1990 RX7 with a 13B and can tell you why it's not the way of the future. I average 16.5 mpg on a N/A engine and it was replaced at 110k, most people won't tollerate that. But as far as weight goes the car is incredibly light and fun to drive(It is in no way fast), thanks to that low weight engine.

Btw, from the factory an RX7 was faster than a Supra, partially because of the huge weight difference in the engines. I6's are really long and heavy. I'd still take the Supra any day though : o )

bubba551:

hp/l?
hp/lb?

How 'bout a metric that has some meaning to real people - $/100mi driven or if you prefer euros/100km.

Using $4.00/gal, 55%city 45% highway and the EPA’s adjusted on-road results. (I would use NEDC, but I can't get numbers for US cars.):

The 2008 7l Corvette cost $22.17 per 100mi driven while the 2008 1l Smart ForTwo cost $11.06 per 100mi driven.

Therefore the ForTwo cost half as much to operate as long as the fuel price is the same.

If, on the other hand, the Smart is being fueled with petrol that cost more than $8.00/gallon (1.35 euro/l), then the Smart Fortwo cost more to operate when compared to the Corvette at $4.00/g.

If other words, if you are driving a 1l Smart someplace where petrol cost more than 1.35 euro/l, then it is costing you more to drive than an American who drives a 7l Corvette.

Z:

I don't see why people keep saying hp/l doesn't matter and yada yada yada. Ofc weight and power ratios say alot more about a cars speed potentials! That was not the starting subject here.

All I said was, don't try to show off with a forced 103hp/l cause it's just nothing you can show off with; it's not exactly state of art engineering. End of story.

bubba551:

Unless you are racing in a class that limits displacement, then hp/ltr IS meaningless since it doesn't really say anything conclusive about power-to-weight or brake specific fuel consumption which are actually meaningful.

Avatar:

Hp/L still isn't as important as hp/lbs in displacement limited races, though slightly more important then in non displacement limited races. You can have a 2L car with 200 hp weighing 2500 lbs or one with 230 hp weighing 3000 lbs. Hp/L goes to the 230 hp car, but they will acelerate and top out at the same speed based on hp/lbs.

Mr. HP-Liter:

I am the product of too many viewings of "Fast and Furious"

Toy Man:

103HP per liter is not so much of an achievement for many production engine today especially FI, but for a production pushrod engine it is since you cannot put a high lift, long duration, and long overlap cam on production engine without any valve technology and have it idle at 700-800rpm. It won’t idle at all. I’m sure the area of 103hp/L was the GM engineers’ safe limit margin. Basic bolt-ons and computer reprogramming on this car will easily make around or above 800HP.
Also, if you compare the Corvettes against the high dollar supercars, it's the underdog. Take for example, the Z06 are delivering supercar performance under the $100,000 price mark. It can hang on with c