BMW 5 Series Gran Turismo (2019) is 109 mm (4.29 inch) longer, 139 mm (5.47 inch) higher, 174 kg (384 lbs) lighter and has 180 liters (6.36 ft3) bigger cargo space than BMW 8 Series (G14) (2020).
BMW 8 Series (G14) (2020) is 35 mm (1.38 inch) wider than BMW 5 Series Gran Turismo (2019).