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 (2017).
Kia Optima Sportswagon (2017) is 186 kg (410 lbs) lighter than BMW 5 Series Touring (2018).