Kia Optima (2016) is 477 mm (18.78 inch) longer, 60 mm (2.36 inch) wider, 172 mm (6.77 inch) higher and has 348 liters (12.29 ft3) bigger cargo space than Porsche Cayman (2017).
Porsche Cayman (2017) is 185 kg (408 lbs) lighter than Kia Optima (2016).
