BMW 6 Series Gran Coupe (2016) is 154 mm (6.06 inch) longer and 35 mm (1.38 inch) wider than Kia Optima (2020).
Kia Optima (2020) is 78 mm (3.07 inch) higher, 420 kg (926 lbs) lighter and has 51 liters (1.80 ft3) bigger cargo space than BMW 6 Series Gran Coupe (2016).
