Hyundai Elantra (2015) is 354 kg (780 lbs) lighter than Kia Optima (2016).
Kia Optima (2016) is 305 mm (12.01 inch) longer, 85 mm (3.35 inch) wider, 20 mm (0.79 inch) higher and has 25 liters (0.88 ft3) bigger cargo space than Hyundai Elantra (2015).
