BMW 6 Series Gran Turismo (2020) is 340 mm (13.39 inch) longer, 82 mm (3.23 inch) wider, 51 mm (2.01 inch) higher and has 154 liters (5.44 ft3) bigger cargo space than Peugeot 408 (2014).
Peugeot 408 (2014) is 375 kg (827 lbs) lighter than BMW 6 Series Gran Turismo (2020).