Audi S7 (2018) is 6 mm (0.24 inch) wider than BMW 6 Series Gran Turismo (2018).
BMW 6 Series Gran Turismo (2018) is 110 mm (4.33 inch) longer, 117 mm (4.61 inch) higher, 245 kg (540 lbs) lighter and has 74 liters (2.61 ft3) bigger cargo space than Audi S7 (2018).