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) (2020).
BMW 8 Series (G15) (2020) is 145 mm (5.71 inch) longer and 32 mm (1.26 inch) wider than BMW 4 Series (2015).
Size difference at a glance
BMW 4 Series (2015) is 3% shorter than BMW 8 Series (G15) (2020).
BMW 4 Series (2015) is 1.7% narrower than BMW 8 Series (G15) (2020).
BMW 4 Series (2015) is 3.1% taller than BMW 8 Series (G15) (2020).
BMW 4 Series (2015) is 13.1% lighter than BMW 8 Series (G15) (2020).
BMW 4 Series (2015) is 6% larger in cargo space than BMW 8 Series (G15) (2020).
Overall footprint
BMW 8 Series (G15) (2020) has a 4.6% smaller overall footprint (length × width).
