The fourth generation Audi 100 was introduced in 1991. Known as the C4, this new generation of 100 was available as a sedan or 'Avant' station wagon, and was powered by a range of inline four, inline five, V6, and V8 engines. The most notable C4 100 variant was the Audi S4 (C4). Production of the C4 100 ended in 1994, when the model was renamed the Audi A6.