BMW 8 Series (G15) (2019) is 579 mm (22.80 inch) longer, 106 mm (4.17 inch) wider and has 70 liters (2.47 ft3) bigger cargo space than FIAT 500X (2018).
FIAT 500X (2018) is 254 mm (10.00 inch) higher and 398 kg (877 lbs) lighter than BMW 8 Series (G15) (2019).