BMW 8 Series (G15) (2018) is 42 mm (1.65 inch) wider than Kia Optima (2015).
Kia Optima (2015) is 12 mm (0.47 inch) longer, 124 mm (4.88 inch) higher, 379 kg (836 lbs) lighter and has 90 liters (3.18 ft3) bigger cargo space than BMW 8 Series (G15) (2018).
