BMW X5 (2015) is 25 mm (0.98 inch) longer, 125 mm (4.92 inch) wider, 284 mm (11.18 inch) higher and has 210 liters (7.42 ft3) bigger cargo space than Kia Optima Sportswagon (2017).
Kia Optima Sportswagon (2017) is 635 kg (1,400 lbs) lighter than BMW X5 (2015).