BMW 8 Series (G14) (2018) is 53 mm (2.09 inch) wider than Kia Cadenza (2015).
Kia Cadenza (2015) is 128 mm (5.04 inch) longer, 137 mm (5.39 inch) higher, 258 kg (569 lbs) lighter and has 100 liters (3.53 ft3) bigger cargo space than BMW 8 Series (G14) (2018).