FIAT 500X (2018) is 125 mm (4.92 inch) higher and 124 kg (273 lbs) lighter than Kia Optima Sportswagon (2015).
Kia Optima Sportswagon (2015) is 591 mm (23.27 inch) longer, 64 mm (2.52 inch) wider and has 203 liters (7.17 ft3) bigger cargo space than FIAT 500X (2018).