BMW 8 Series (G15) (2019) is 238 mm (9.37 inch) longer, 102 mm (4.02 inch) wider and has 25 liters (0.88 ft3) bigger cargo space than Kia Pro Ceed (2020).
Kia Pro Ceed (2020) is 81 mm (3.19 inch) higher and 488 kg (1,076 lbs) lighter than BMW 8 Series (G15) (2019).