BMW 3 Series Gran Turismo (2018) is 551 mm (21.69 inch) longer, 32 mm (1.26 inch) wider and has 170 liters (6.00 ft3) bigger cargo space than FIAT 500X (2017).
FIAT 500X (2017) is 100 mm (3.94 inch) higher and 385 kg (849 lbs) lighter than BMW 3 Series Gran Turismo (2018).