Peugeot 408 (2017) is 125 mm (4.92 inch) longer, 42 mm (1.65 inch) wider, 33 mm (1.30 inch) higher and has 107 liters (3.78 ft3) bigger cargo space than Subaru Impreza GJ (2016).
Subaru Impreza GJ (2016) is 200 kg (441 lbs) lighter than Peugeot 408 (2017).