Kia Optima Sportswagon (2017) is 25 mm (0.98 inch) longer and 32 mm (1.26 inch) wider than Peugeot 508 SW (2016).
Peugeot 508 SW (2016) is 17 mm (0.67 inch) higher, 140 kg (309 lbs) lighter and has 90 liters (3.18 ft3) bigger cargo space than Kia Optima Sportswagon (2017).