BMW 6 Series Gran Turismo (2018) is 715 mm (28.15 inch) longer, 97 mm (3.82 inch) wider and has 85 liters (3.00 ft3) bigger cargo space than Kia Niro EV (2018).
Kia Niro EV (2018) is 21 mm (0.83 inch) higher and 47 kg (104 lbs) lighter than BMW 6 Series Gran Turismo (2018).