BMW 5 Series Gran Turismo (2018) is 944 mm (37.17 inch) longer, 92 mm (3.62 inch) wider and has 270 liters (9.53 ft3) bigger cargo space than BMW i3 (2015).
BMW i3 (2015) is 110 mm (4.33 inch) higher and 454 kg (1,001 lbs) lighter than BMW 5 Series Gran Turismo (2018).