Audi 100 C4, 1991–1997

A heavily revised C3, the C4, was introduced in 1991. The C3-platform V8 continued to be sold as a separate line. The major change was the introduction of a 2.8l V6 engine. It was later joined by a 2.6l variant. They were essentially the same engines as the two V6 introduced for the 1992 Audi 80. The option of quattro all wheel drive was an option across the range, and the Audi 100 quattro was available with a ZF 4-speed automatic gearbox.

For the 1995 model year, Audi dropped the 100 nameplate, calling it the A6 instead. In addition, what had previously been sold as the S4 became the S6, however the two models became completely independent of one another after Audi's replacement of the 80 with the A4 model in 1994. The V8 was eventually replaced by the A8 in 1994.