BMW 8 Series (G14) (2018) is 491 mm (19.33 inch) longer and 129 mm (5.08 inch) wider than FIAT 500L Trekking (2020).
FIAT 500L Trekking (2020) is 330 mm (12.99 inch) higher, 533 kg (1,175 lbs) lighter and has 62 liters (2.19 ft3) bigger cargo space than BMW 8 Series (G14) (2018).