BMW 3 Series Gran Turismo (2014) is 169 mm (6.65 inch) higher, 188 kg (414 lbs) lighter and has 170 liters (6.00 ft3) bigger cargo space than BMW 8 Series (G14) (2019).
BMW 8 Series (G14) (2019) is 19 mm (0.75 inch) longer and 74 mm (2.91 inch) wider than BMW 3 Series Gran Turismo (2014).