Kia Optima (2015) is 430 mm (16.93 inch) longer, 130 mm (5.12 inch) wider and has 224 liters (7.91 ft3) bigger cargo space than Toyota Yaris (Sedan) (2015).
Toyota Yaris (Sedan) (2015) is 30 mm (1.18 inch) higher and 486 kg (1,071 lbs) lighter than Kia Optima (2015).
