Kia Optima (2018) is 343 mm (13.50 inch) longer, 267 mm (10.51 inch) higher and has 366 liters (12.93 ft3) bigger cargo space than McLaren 650S Coupe (2015).
McLaren 650S Coupe (2015) is 233 mm (9.17 inch) wider and 92 kg (203 lbs) lighter than Kia Optima (2018).