BMW 4 Series (2013) is 21 mm (0.83 inch) higher, 339 kg (747 lbs) lighter and has 25 liters (0.88 ft3) bigger cargo space than BMW 8 Series (G15) (2018).
BMW 8 Series (G15) (2018) is 205 mm (8.07 inch) longer and 77 mm (3.03 inch) wider than BMW 4 Series (2013).
