BMW 1 Series (2014) is 8 mm (0.31 inch) wider than Subaru Impreza GP (2016).
Subaru Impreza GP (2016) is 55 mm (2.17 inch) longer, 59 mm (2.32 inch) higher, 105 kg (231 lbs) lighter and has 25 liters (0.88 ft3) bigger cargo space than BMW 1 Series (2014).