Kia Optima Sportswagon (2018) is 25 mm (0.98 inch) longer and 32 mm (1.26 inch) wider than Peugeot 508 (2017).
Peugeot 508 (2017) is 17 mm (0.67 inch) higher, 251 kg (553 lbs) lighter and has 90 liters (3.18 ft3) bigger cargo space than Kia Optima Sportswagon (2018).