Audi RS 7 (2020) is 137 mm (5.39 inch) longer, 9 mm (0.35 inch) wider, 67 mm (2.64 inch) higher and has 118 liters (4.17 ft3) bigger cargo space than BMW 8 Series (G15) (2018).
BMW 8 Series (G15) (2018) is 141 kg (311 lbs) lighter than Audi RS 7 (2020).
