Both cars can be equipped with optional torque vectoring, a brake-based system built to augment the mechanically lockingrear differential and help put power to the ground.
The mighty 12 is backed up by an eight-speed transmission and Audi's Quattro all-wheel drive system (with electrically locking front and rear differentials, no less).
The M5's reinforced active locking and torque-vectoring rear differential (the Active M-Differential) brilliantly adjudicates traction between the rear wheels.