BMW 3 Series Gran Turismo (2014) is 65 mm (2.56 inch) higher, 20 kg (44 lbs) lighter and has 138 liters (4.87 ft3) bigger cargo space than INFINITI Q50 (2014).
INFINITI Q50 (2014) is 27 mm (1.06 inch) longer and 16 mm (0.63 inch) wider than BMW 3 Series Gran Turismo (2014).