Kia Optima (2018) is 1 mm (0.04 inch) longer and 464 kg (1,023 lbs) lighter than Toyota Highlander (2014).
Toyota Highlander (2014) is 65 mm (2.56 inch) wider, 260 mm (10.24 inch) higher and has 355 liters (12.54 ft3) bigger cargo space than Kia Optima (2018).