BMW X1 (2016) is 128 mm (5.04 inch) higher and 80 kg (176 lbs) lighter than Kia Optima Sportswagon (2015).
Kia Optima Sportswagon (2015) is 416 mm (16.38 inch) longer, 39 mm (1.54 inch) wider and has 48 liters (1.70 ft3) bigger cargo space than BMW X1 (2016).