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 A8
The D2 series S8 featured an uprated, version of the 4.2-litre V8 with four valves per cylinder. From late 1999, Audi increased this to five valves per cylinder with power increased to and . From launch in 1996, European-market models came standard with a six-speed manual transmission. A sports-recalibrated version of the ZF "5HP24" five-speed tiptronic automatic, featuring "Dynamic Shift Programme" (DSP) was released a year later and was the only transmission available in most other markets.