Audi S6
Audi made a high-performance, 4.2-litre V8 engine (parts code prefix: 077, identification code: AEC) with a Bosch KE-Motronic ECU available as an option in the original European S4s, and made the decision to continue to do so with the S6, making a version of the 4.2 available as an optional upgrade over the 2.2-litre inline five-cylinder turbo. Unlike the five-cylinder turbocharged version, the V8-powered S6 was supplied with a four-speed automatic transmission as standard, but kept the quattro four wheel drive. A six-speed manual gearbox was also available as an option.
Audi A3
The Audi RS 3 is derivative of the A3 Sportback with a 5-cylinder, turbocharged engine rated at and , vermicular-graphite cast iron crankcase, seven-speed S tronic transmission with two automatic modes and one manual mode, Quattro on-demand four-wheel drive system, widened track to , MacPherson strut in aluminum, lowered body by , 19-inch cast aluminum wheels in machine-polished titanium styling (optional black with a red rim flange) with 235/35 front and 225/35 rear tires, front and ventilated brake discs, aluminum brake disk covers, four-piston fixed calipers in high-gloss black with RS logos, electronic stabilization program with Sport mode, flared front fenders made of carbon-fiber-reinforced plastic (CFRP), prominent sill panels and exterior-mirror casings in matte aluminum, roof spoiler, high-gloss black diffuser insert, two elliptical exhaust tailpipes on the left, black interior, sports seats upholstered in Nappa leather with silver contrasting stitching, inlays in Piano black finish or Aluminum Race colour, flat-bottomed leather multifunction sports steering wheel, choice of 5 body colors are available with an unlimited selection of custom paint finishes. It's acceleration is quoted as in 4.6 seconds, with an electronically limited top speed of . Optional features included front bucket seats, roof rails in matte aluminum look, styling packages in black or matte aluminum.