BMW 4 Series (2015) is 42 mm (1.65 inch) higher, 239 kg (527 lbs) lighter and has 25 liters (0.88 ft3) bigger cargo space than BMW 8 Series (G15) (2019).
BMW 8 Series (G15) (2019) is 145 mm (5.71 inch) longer and 32 mm (1.26 inch) wider than BMW 4 Series (2015).
