Aston Martin DB9 (2014) is 21 mm (0.83 inch) longer and 10 mm (0.39 inch) wider than BMW 4 Series (2016).
BMW 4 Series (2016) is 100 mm (3.94 inch) higher, 200 kg (441 lbs) lighter and has 303 liters (10.70 ft3) bigger cargo space than Aston Martin DB9 (2014).
