BMW 5 Series Gran Turismo (2020) is 100 mm (3.94 inch) longer, 137 mm (5.39 inch) higher, 79 kg (174 lbs) lighter and has 110 liters (3.88 ft3) bigger cargo space than BMW 8 Series (G15) (2020).
BMW 8 Series (G15) (2020) is 35 mm (1.38 inch) wider than BMW 5 Series Gran Turismo (2020).