BMW 8 Series (G14) (2020) is 343 mm (13.50 inch) longer, 94 mm (3.70 inch) wider, 44 mm (1.73 inch) higher and has 205 liters (7.24 ft3) bigger cargo space than Porsche 911 (2020).
Porsche 911 (2020) is 388 kg (855 lbs) lighter than BMW 8 Series (G14) (2020).