Kia Optima (2018) is 227 mm (8.94 inch) longer, 82 mm (3.23 inch) wider, 17 mm (0.67 inch) higher and has 71 liters (2.51 ft3) bigger cargo space than Volkswagen Sagitar (2014).
Volkswagen Sagitar (2014) is 258 kg (569 lbs) lighter than Kia Optima (2018).