BMW 8 Series (G14) (2018) is 98 mm (3.86 inch) longer and 87 mm (3.43 inch) wider than Hyundai i40 (2020).
Hyundai i40 (2020) is 131 mm (5.16 inch) higher, 531 kg (1,171 lbs) lighter and has 175 liters (6.18 ft3) bigger cargo space than BMW 8 Series (G14) (2018).