BMW 3 Series Gran Turismo (2014) is 385 mm (15.16 inch) longer, 7 mm (0.28 inch) wider and has 15 liters (0.53 ft3) bigger cargo space than BMW X1 (2016).
BMW X1 (2016) is 90 mm (3.54 inch) higher and 265 kg (584 lbs) lighter than BMW 3 Series Gran Turismo (2014).