Hyundai Elantra GT (2017) is 1 mm (0.04 inch) higher and 231 kg (509 lbs) lighter than Kia Optima Sportswagon (2015).
Kia Optima Sportswagon (2015) is 555 mm (21.85 inch) longer, 79 mm (3.11 inch) wider and has 145 liters (5.12 ft3) bigger cargo space than Hyundai Elantra GT (2017).