BMW 8 Series (G16) (2019) is 591 mm (23.27 inch) longer, 124 mm (4.88 inch) wider, 112 mm (4.41 inch) higher and has 295 liters (10.42 ft3) bigger cargo space than Porsche 911 (2016).
Porsche 911 (2016) is 349 kg (769 lbs) lighter than BMW 8 Series (G16) (2019).