Buick Regal TourX (2018) is 131 mm (5.16 inch) longer, 2 mm (0.08 inch) wider, 18 mm (0.71 inch) higher and has 90 liters (3.18 ft3) bigger cargo space than Kia Optima (2015).
Kia Optima (2015) is 137 kg (302 lbs) lighter than Buick Regal TourX (2018).
