Peugeot 408 (2014) is 1052 mm (41.42 inch) longer, 100 mm (3.94 inch) wider, 4 mm (0.16 inch) higher and has 285 liters (10.06 ft3) bigger cargo space than Vauxhall Adam (2015).
Vauxhall Adam (2015) is 339 kg (747 lbs) lighter than Peugeot 408 (2014).