See also: Audi Ur-S4 / Ur-S6and Audi S4#C4
Audi was restructuring their model lineup in early and mid-1990s, and in 1995 began selling the fifth generation (C4) Audi 100 model re-badged as the Audi A6. Wanting to keep a sports-saloon in their lineup, the company made small revisions to what was previously known as the Audi S4, renaming it the Audi S6; the S4 name would eventually be re-used for a completely different model derived from Audi's smaller Volkswagen Group B platform-based Audi A4. As this was the first S6 model from Audi, it is commonly referred to as the Ur-S6, derived from the German augmentive, Ursprünglich (meaning: original).
It was available as both a saloon/sedan, and an "Avant" (estate/wagon) to European and United States customers, but only as a saloon in Canada, Asia and Australia.
For 1995, the S6 was powered by a 2,228cc (136.0cuin) turbocharged inline five-cylinder petrol engine, producing 169kW (230PS; 227bhp) at 5900rpm and 326N·m (240.4ft·lbf) at around 1950rpm. The powerful engine gave the S6 surprisingly good performance, it had a top speed of 235km/h (146mph) and went from 0 to 100km/h (62mph) in 6.1 seconds; 160km/h (99mph) was reached in 17.5 seconds. After a chip. Car easily achieves ~280HP.
The vehicle came standard with a six-speed manual transmission (5 speed only in North America), and Audi's Torsen T-2 quattro permanent four-wheel drive system.
Audi made a high-performance, 4.2L V8 engine available as an option in the original European S4s, and made the decision to continue to do so with the S6, making a 213kW (290PS; 286bhp) version of the 4.2 available as an optional upgrade over the 2.2L 5-cylinder. Unlike the 5-cylinder turbocharged version, the V8-powered S6 was supplied with an automatic transmission as standard, but kept the quattro four wheel drive. A 6-speed manual gearbox was also available as an option.
C4 brakes, wheels and tyres
C4 braking system included radially ventilated disc brakes front and rear, with 10.9in (276.9mm) diameter discs up front, and 10.6in (269.2mm) diameter discs at the rear. Anti-lock braking system (ABS) was also standard.