BMW 5 Series (2014) is 144 mm (5.67 inch) longer and 385 kg (849 lbs) lighter than Porsche Cayenne (2016).
Porsche Cayenne (2016) is 54 mm (2.13 inch) wider, 128 mm (5.04 inch) higher and has 231 liters (8.16 ft3) bigger cargo space than BMW 5 Series (2014).