Buick Enclave (2014) is 273 mm (10.75 inch) longer, 147 mm (5.79 inch) wider, 356 mm (14.02 inch) higher and has 150 liters (5.30 ft3) bigger cargo space than Kia Optima (2015).
Kia Optima (2015) is 696 kg (1,534 lbs) lighter than Buick Enclave (2014).