Aston Martin DB9 (2014) is 295 mm (11.61 inch) longer and 76 mm (2.99 inch) wider than Mercedes GLA-Class (2016).
Mercedes GLA-Class (2016) is 211 mm (8.31 inch) higher, 390 kg (860 lbs) lighter and has 279 liters (9.85 ft3) bigger cargo space than Aston Martin DB9 (2014).