An auto supercharger, also known as a turbocharger, is a device that forces additional air into an engine to increase its power output. It is typically used in cars and other vehicles to increase the amount of power available for acceleration. The term 'turbo' is derived from the Greek word for 'SPINNING, ' which describes the way the device works. By forcing more air into the engine, it increases the amount of fuel that can be burned, resulting in increased power.