BMW 5 Series Gran Turismo (2020) is 100 mm (3.94 inch) longer, 139 mm (5.47 inch) higher, 178 kg (392 lbs) lighter and has 180 liters (6.36 ft3) bigger cargo space than BMW 8 Series (G14) (2018).
BMW 8 Series (G14) (2018) is 35 mm (1.38 inch) wider than BMW 5 Series Gran Turismo (2020).