Rear-wheel drive transaxle

A rear-wheel drive construction incorporating a transmission-differential unit placed between the rear wheels of a front-engined car. The engine may be a front engine (as in most cars and all trucks), a mid-engine (as in some sports and racing cars), or a rear engine (as in some city cars, VW Beetle, the Porsche 911 series, and most buses); RWD ensures good acceleration without wheelspin even on cars with powerful engines; on most small cars, RWD has been superseded by front-wheel drive.