BMW 5 Series Touring (2015) is 141 mm (5.55 inch) longer, 40 mm (1.57 inch) wider, 87 mm (3.43 inch) higher and has 120 liters (4.24 ft3) bigger cargo space than Kia Optima Sportswagon (2018).
Kia Optima Sportswagon (2018) is 189 kg (417 lbs) lighter than BMW 5 Series Touring (2015).