BMW 4 Series (2015) is 283 mm (11.14 inch) longer, 130 mm (5.12 inch) wider and has 60 liters (2.12 ft3) bigger cargo space than Subaru Impreza GP (2014).
Subaru Impreza GP (2014) is 87 mm (3.43 inch) higher and 190 kg (419 lbs) lighter than BMW 4 Series (2015).