Kia Optima (2017) is 471 mm (18.54 inch) longer, 135 mm (5.31 inch) wider and has 123 liters (4.34 ft3) bigger cargo space than Kia Rio (Sedan) (2018).
Kia Rio (Sedan) (2018) is 140 mm (5.51 inch) higher and 329 kg (725 lbs) lighter than Kia Optima (2017).
