FIAT 500X (2017) is 138 mm (5.43 inch) higher and 476 kg (1,049 lbs) lighter than Kia Optima Sportswagon (2018).
Kia Optima Sportswagon (2018) is 582 mm (22.91 inch) longer, 64 mm (2.52 inch) wider and has 90 liters (3.18 ft3) bigger cargo space than FIAT 500X (2017).