Supercharger

A supercharger is a device that forces air into the engine to enhance performance. It operates in a very similar way to a turbocharger, and in fact a turbocharger is actually a form of supercharger (and used to be called a turbosupercharger) but the term “supercharger” in modern automotive use is generally accepted to refer to a supercharger that is mechanically driven (by a belt, chain, gear etc. unlike turbos which are driven by air flow).