Audi Q7 (2018) is 209 mm (8.23 inch) longer, 67 mm (2.64 inch) wider, 399 mm (15.71 inch) higher and has 590 liters (20.84 ft3) bigger cargo space than BMW 8 Series (G15) (2020).
BMW 8 Series (G15) (2020) is 236 kg (520 lbs) lighter than Audi Q7 (2018).