BMW 8 Series (G15) (2018) is 418 mm (16.46 inch) longer and 39 mm (1.54 inch) wider than Volvo XC40 (2016).
Volvo XC40 (2016) is 311 mm (12.24 inch) higher, 191 kg (421 lbs) lighter and has 40 liters (1.41 ft3) bigger cargo space than BMW 8 Series (G15) (2018).
