BMW 4 Series (2015) is 10 mm (0.39 inch) wider, 241 kg (531 lbs) lighter and has 5 liters (0.18 ft3) bigger cargo space than Kia Optima Sportswagon (2018).
Kia Optima Sportswagon (2018) is 157 mm (6.18 inch) longer and 87 mm (3.43 inch) higher than BMW 4 Series (2015).
