Hyundai Elantra GT (2018) is 399 kg (880 lbs) lighter than Kia Optima Sportswagon (2017).
Kia Optima Sportswagon (2017) is 515 mm (20.28 inch) longer, 64 mm (2.52 inch) wider, 4 mm (0.16 inch) higher and has 32 liters (1.13 ft3) bigger cargo space than Hyundai Elantra GT (2018).