Chevrolet Impala Limited (2015) is 340 mm (13.39 inch) longer, 32 mm (1.26 inch) wider, 3 mm (0.12 inch) higher and has 72 liters (2.54 ft3) bigger cargo space than Peugeot 408 (2017).
Peugeot 408 (2017) is 193 kg (425 lbs) lighter than Chevrolet Impala Limited (2015).