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 A6
It is a version of S6 Avant with increased engine power to at 5700–6700 rpm and at 1750–5500 rpm, cylinder on demand system deactivates intake and exhaust valves of 4 cylinders (2, 3, 5 and 8), eight-speed tiptronic transmission with shortened shift times and D and S driving modes, quattro permanent all-wheel drive system with torque vectoring with self-locking center differential with an elevated locking value and oil cooler, adaptive air suspension lowering body by (optional tauter sport suspension plus with Dynamic Ride Control), option is dynamic steering, four internally vented diameter brake discs in wave design with a wave-like outer contour (optional diameter carbon fiber-ceramic brake discs with anthracite gray calipers), black six-piston brake calipers (optional red brake calipers), electronic stabilization control with Sport and off modes, high-gloss 20-inch forged wheels in a seven twin-spoke design (optional 21-inch cast wheels in high-gloss silver, polished black or polished titanium-look), matte aluminum applications on the body, high-gloss black protective grille at the front of the car, the bumpers, the fender, sill flares and the large roof spoiler; rear diffuser with two large elliptical exhaust tailpipes, a choice of 9 body colours (including exclusive shade Daytona Gray matte), dial instruments feature black faces and white dials and red needles, flat-bottomed three-spoke multifunction steering wheel, illuminated entry sills, driver information system (DIS) sport RS logos, RS 6-specific driver information system, footrest and pedals and switches in the MMI navigation plus terminal in aluminum finish, decorative bezel surrounding the retractable monitor in a piano finish, interior door openers in a delicate double-bar design, standard Carbon inlays (with six additional materials as options), standard black headlining (optional Silver or black Alcantara), RS sport seats with side bolsters and integrated head restraints and RS 6 logos upholstered in black Alcantara and leather with diamond quilting at center sections (optional honeycomb-quilted Valcona leather in either black or Moon Silver), optional power-adjustable deluxe seats with memory function, two sportily molded rear seats (optional three-person bench seat), xenon plus headlights, LED rear lights, a tire-pressure control system, illuminated entry sills, custom driver-information system, parking system plus, cruise control, three-zone automatic air conditioning, MMI navigation plus with MMI touch and the 10-speaker Audi sound system.