( http://www.TFLcar.com ) The 2012 Subaru Impreza is all new. This fourth generation all-wheel-drive Impreza is all about better gas mileage and of course a little more room. For 2012 the Subaru engineers have added both shoulder and leg room to the new car as well as improved the gas mileage will a new all-aluminum engine block 2.0L engine mated to either a 5 speed manual or a CVT transmission making it America's most fuel-efficient all-wheel-drive passenger car