BMW 5 Series (2017) is 113 mm (4.45 inch) longer, 39 mm (1.54 inch) wider, 12 mm (0.47 inch) higher and has 39 liters (1.38 ft3) bigger cargo space than Peugeot 508 SW (2014).
Peugeot 508 SW (2014) is 140 kg (309 lbs) lighter than BMW 5 Series (2017).