Mercedes A-Class (2017) is 138 mm (5.43 inch) higher, 46 kg (101 lbs) lighter and has 191 liters (6.75 ft3) bigger cargo space than Porsche 718 Cayman (2014).
Porsche 718 Cayman (2014) is 87 mm (3.43 inch) longer and 20 mm (0.79 inch) wider than Mercedes A-Class (2017).
