Buick Regal TourX (2020) is 202 mm (7.95 inch) longer, 89 mm (3.50 inch) higher, 130 kg (287 lbs) lighter and has 276 liters (9.75 ft3) bigger cargo space than Ford Mustang (2015).
Ford Mustang (2015) is 54 mm (2.13 inch) wider than Buick Regal TourX (2020).