BMW 3 Series Touring (2015) is 194 mm (7.64 inch) longer than BMW X1 (2018).
BMW X1 (2018) is 10 mm (0.39 inch) wider, 169 mm (6.65 inch) higher, 75 kg (165 lbs) lighter and has 10 liters (0.35 ft3) bigger cargo space than BMW 3 Series Touring (2015).