BMW 8 Series (G15) (2018) is 468 mm (18.43 inch) longer and 97 mm (3.82 inch) wider than Kia Niro EV (2018).
Kia Niro EV (2018) is 219 mm (8.62 inch) higher, 176 kg (388 lbs) lighter and has 104 liters (3.67 ft3) bigger cargo space than BMW 8 Series (G15) (2018).