Like all Audi "RS" models, the RS 6 is fitted with Audi's 'trademark' Quattro permanent four-wheel drive as standard. This version of the RS 6 uses the latest asymmetric dynamic 40:60 front-to-rear default torque distribution from the Torsen T-3 'automatic torque biasing' (ATB) centre differential. This latest incarnation of the Torsen Quattro, first seen in the B7 RS 4, can automatically dynamically apportion up to a maximum 100% torque to the rear axle, or up to 80% to the front, dependent on traction conditions.