Aston Martin DB9 (2016) is 585 mm (23.03 inch) longer and 63 mm (2.48 inch) wider than Mercedes SLK-Class (2014).
Mercedes SLK-Class (2014) is 20 mm (0.79 inch) higher, 330 kg (728 lbs) lighter and has 148 liters (5.23 ft3) bigger cargo space than Aston Martin DB9 (2016).