Audi S8 (2014) is 57 mm (2.24 inch) longer and 47 mm (1.85 inch) wider than BMW 6 Series Gran Turismo (2020).
BMW 6 Series Gran Turismo (2020) is 71 mm (2.80 inch) higher, 1199 kg (2,643 lbs) lighter and has 104 liters (3.67 ft3) bigger cargo space than Audi S8 (2014).
