Audi S4 name was originally used to refer to high-performance sport version of the Audi 100, later it has been used for the same modification Audi A4. Produced in the factory Audi AG in Ingolstadt (Germany), Audi S4 was available in the following bodies: the five-door five-seater hatchback, sedan and two-door five-seater četyrëhdvernyj four-seater convertible. In all models the engine is up front in the longitudinal direction. Like all Audi S-series model, the S4 is only available with quattro four-wheel drive system.