Chevrolet Impala (2015) is 258 mm (10.16 inch) longer, 31 mm (1.22 inch) higher and has 23 liters (0.81 ft3) bigger cargo space than Kia Optima (2016).
Kia Optima (2016) is 6 mm (0.24 inch) wider and 134 kg (295 lbs) lighter than Chevrolet Impala (2015).
