Kia Optima (2018) is 489 mm (19.25 inch) longer, 140 mm (5.51 inch) wider, 15 mm (0.59 inch) higher and has 123 liters (4.34 ft3) bigger cargo space than Kia Rio (Sedan) (2015).
Kia Rio (Sedan) (2015) is 467 kg (1,030 lbs) lighter than Kia Optima (2018).
