BMW 5 Series Touring (2018) is 151 mm (5.94 inch) longer, 35 mm (1.38 inch) wider, 95 mm (3.74 inch) higher and has 130 liters (4.59 ft3) bigger cargo space than Kia Optima Sportswagon (2018).
Kia Optima Sportswagon (2018) is 75 kg (165 lbs) lighter than BMW 5 Series Touring (2018).