BMW 5 Series Gran Turismo (2015) is 163 mm (6.42 inch) longer, 220 mm (8.66 inch) higher and has 150 liters (5.30 ft3) bigger cargo space than BMW 8 Series (G14) (2019).
BMW 8 Series (G14) (2019) is 2 mm (0.08 inch) wider and 207 kg (456 lbs) lighter than BMW 5 Series Gran Turismo (2015).