Kia Optima (2015) is 276 mm (10.87 inch) longer, 64 mm (2.52 inch) wider, 10 mm (0.39 inch) higher and has 91 liters (3.21 ft3) bigger cargo space than Mazda 3 (Sedan) (2014).
Mazda 3 (Sedan) (2014) is 245 kg (540 lbs) lighter than Kia Optima (2015).
