Audi Ur-S4 / Ur-S6
The Ur-S4 was produced from 1991 to 1994, while the Ur-S6 was produced from 1995 to 1997. They both featured a 2.2 litre, 5-cylinder engine with turbocharging and an intercooler, with of torque. In Europe, V8-powered versions of both S4 and S6 were available. The S4 version sported a engine (the same "ABH" engine as in Audi V8), the S6 had an upgraded engine "AEC" with . American versions featured a 5-speed manual transmission and in Europe a 6-speed, as well as a 4-speed automatic transmission could be substituted.
Audi RS 4
Noticeable changes to the B9 included a more angular exterior, newly designed wheels, and a new turbocharged 2.9 V6 engine. Unlike the pre-facelift B8 RS4 which had a 7-speed dual-clutch S-tronic transmission, the B9 RS4 is available with an 8-speed torque converter tiptronic automatic.