Kia Optima Sportswagon (2015) is 430 mm (16.93 inch) longer, 183 kg (403 lbs) lighter and has 93 liters (3.28 ft3) bigger cargo space than Volvo XC40 (2015).
Volvo XC40 (2015) is 3 mm (0.12 inch) wider and 182 mm (7.17 inch) higher than Kia Optima Sportswagon (2015).