BMW 5 Series Touring (2017) is 307 mm (12.09 inch) longer, 264 mm (10.39 inch) higher and has 406 liters (14.34 ft3) bigger cargo space than BMW i8 (2017).
BMW i8 (2017) is 42 mm (1.65 inch) wider and 455 kg (1,003 lbs) lighter than BMW 5 Series Touring (2017).