Further detail of the engine includes fully sequential electronic multi-point fuel injection with intake manifold-sited fuel injectors,[REF] mapped direct ignition system[REF] with solid-state high voltage distribution using eight individual single-spark ignition coils and NGK longlife spark plugs, and three knock sensors.
The RS6 was only available with Audi's Torsen-based quattro permanent four-wheel drive, utilising the Torsen T-2 dynamic 'automatic torque biasing' (ATB) centre differential (diff), a modified unit which was being used in the 6.0-litre W12-powered Audi D2 A8.