BMW 8 Series (G15) (2018) is 533 mm (20.98 inch) longer, 122 mm (4.80 inch) wider and has 40 liters (1.41 ft3) bigger cargo space than Kia Ceed (2014).
Kia Ceed (2014) is 129 mm (5.08 inch) higher and 666 kg (1,468 lbs) lighter than BMW 8 Series (G15) (2018).