Buick Enclave (2015) is 273 mm (10.75 inch) longer, 147 mm (5.79 inch) wider, 320 mm (12.60 inch) higher and has 150 liters (5.30 ft3) bigger cargo space than Kia Optima (2015).
Kia Optima (2015) is 607 kg (1,338 lbs) lighter than Buick Enclave (2015).