Audi S4
Audi's quattro four-wheel-drive system was standard on the C4 S4/S6; a first-generation Torsen-based system which used the "T-1" automatically biasing centre differential (ATB) was used on vehicles equipped with manual transmissions, while a transfer box based system was used on vehicles equipped with an automatic transmission.
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.