1995.5 Audi S6 Quattro 5-speed | Rare color combination | 5-cylinder turbo Sold The Audi S6 is the performance variant of the Audi A6 executive car which debuted in 1994, replacing the Audi 100 nameplate previously used for the chassis. Somewhat confusingly, the same body style was called the S4 prior to 1994. The change