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 Pikes Peak quattro
Engine output is transmitted through a 6-speed tiptronic automatic transmission, complete with steering wheel mounted paddle shifters. quattro permanent four wheel drive system is also standard.