Buick Regal (2017) is 3 mm (0.12 inch) higher and 40 kg (88 lbs) lighter than Kia Optima Sportswagon (2017).
Kia Optima Sportswagon (2017) is 24 mm (0.94 inch) longer, 3 mm (0.12 inch) wider and has 38 liters (1.34 ft3) bigger cargo space than Buick Regal (2017).
