Buick Regal (2015) is 145 mm (5.71 inch) longer, 47 mm (1.85 inch) wider, 74 mm (2.91 inch) higher and has 46 liters (1.62 ft3) bigger cargo space than Mercedes C-Class (Coupe) (2020).
Mercedes C-Class (Coupe) (2020) is 125 kg (276 lbs) lighter than Buick Regal (2015).