BMW 8 Series (G15) (2019) is 491 mm (19.33 inch) longer, 129 mm (5.08 inch) wider and has 8 liters (0.28 ft3) bigger cargo space than FIAT 500L Trekking (2020).
FIAT 500L Trekking (2020) is 328 mm (12.91 inch) higher and 434 kg (957 lbs) lighter than BMW 8 Series (G15) (2019).