BMW 8 Series (G15) (2018) is 428 mm (16.85 inch) longer, 162 mm (6.38 inch) wider and has 35 liters (1.24 ft3) bigger cargo space than Subaru Impreza GP (2016).
Subaru Impreza GP (2016) is 129 mm (5.08 inch) higher and 529 kg (1,166 lbs) lighter than BMW 8 Series (G15) (2018).