BMW 8 Series (G16) (2019) is 227 mm (8.94 inch) longer and 291 kg (642 lbs) lighter than Porsche Cayenne (2021).
Porsche Cayenne (2021) is 22 mm (0.87 inch) wider, 281 mm (11.06 inch) higher and has 230 liters (8.12 ft3) bigger cargo space than BMW 8 Series (G16) (2019).