BMW 3 Series Gran Turismo (2018) is 74 mm (2.91 inch) longer, 8 mm (0.31 inch) wider, 20 mm (0.79 inch) higher and has 65 liters (2.30 ft3) bigger cargo space than Peugeot 408 (2017).
Peugeot 408 (2017) is 315 kg (694 lbs) lighter than BMW 3 Series Gran Turismo (2018).