BMW 8 Series (G14) (2018) is 418 mm (16.46 inch) longer and 97 mm (3.82 inch) wider than INFINITI Q30 (2019).
INFINITI Q30 (2019) is 136 mm (5.35 inch) higher, 258 kg (569 lbs) lighter and has 80 liters (2.83 ft3) bigger cargo space than BMW 8 Series (G14) (2018).
