Ford Mustang (2015) is 406 mm (15.98 inch) longer, 116 mm (4.57 inch) wider, 101 mm (3.98 inch) higher and has 162 liters (5.72 ft3) bigger cargo space than Porsche Cayman (2015).
Porsche Cayman (2015) is 407 kg (897 lbs) lighter than Ford Mustang (2015).