BMW 8 Series (G15) (2020) is 579 mm (22.80 inch) longer, 106 mm (4.17 inch) wider and has 170 liters (6.00 ft3) bigger cargo space than FIAT 500X (2020).
FIAT 500X (2020) is 254 mm (10.00 inch) higher and 423 kg (933 lbs) lighter than BMW 8 Series (G15) (2020).