The Buick Regal is going to get a mild hybrid system that is similar to the 2012 Buick LaCrosse. The Buick LaCrosse with eAssist gets 25 percent better fuel economy than the current 2.4L LaCrosse. In the LaCrosse the mild hybrid system mates a 115 volt lithium-ion battery and 15-kilowatt electric motor to the2.4L four-cylinder engine and six-speed automatic transmission. The LaCrosse gets 25 mpg city and 37 mpg highway. The hybrid version is expected to get similar mpg numbers.
Unlike the LaCrosse, the hybrid version of the Regal will not be the base powertrain.
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