Kia Optima (2016) is 1096 kg (2,416 lbs) lighter than Lincoln Navigator (2017).
Lincoln Navigator (2017) is 479 mm (18.86 inch) longer, 169 mm (6.65 inch) wider, 473 mm (18.62 inch) higher and has 1290 liters (45.56 ft3) bigger cargo space than Kia Optima (2016).