Kia Forte (Sedan) (2015) is 292 kg (644 lbs) lighter than Kia Optima (2015).
Kia Optima (2015) is 214 mm (8.43 inch) longer, 59 mm (2.32 inch) wider, 30 mm (1.18 inch) higher and has 77 liters (2.72 ft3) bigger cargo space than Kia Forte (Sedan) (2015).