Buick Regal TourX (2019) is 131 mm (5.16 inch) longer, 2 mm (0.08 inch) wider, 13 mm (0.51 inch) higher and has 47 liters (1.66 ft3) bigger cargo space than Kia Optima Sportswagon (2015).
Kia Optima Sportswagon (2015) is 132 kg (291 lbs) lighter than Buick Regal TourX (2019).