BMW 5 Series (2019) is 100 mm (3.94 inch) longer, 158 mm (6.22 inch) higher, 209 kg (461 lbs) lighter and has 149 liters (5.26 ft3) bigger cargo space than BMW 8 Series (G15) (2018).
BMW 8 Series (G15) (2018) is 35 mm (1.38 inch) wider than BMW 5 Series (2019).