The Alpina B5 Touring is powered by the same 4.4L V8 as the sedan, but in the B5 Touring the engine puts out 507 horsepower and 516 lb-ft. of torque. The engine is mated to an eight-speed automatic transmission. 0-62 mph is reached in 4.8 seconds and the wagon has a top speed of 187 mph. Other additions include a new aero kit and 20-spoke wheels. BMW has no plans for an M5 wagon, so this is your only choice if you were waiting for one.