BMW 7 Series (2018) is 135 mm (5.31 inch) longer, 100 mm (3.94 inch) higher, 280 kg (617 lbs) lighter and has 149 liters (5.26 ft3) bigger cargo space than Porsche Taycan (2020).
Porsche Taycan (2020) is 64 mm (2.52 inch) wider than BMW 7 Series (2018).