BMW 4 Series Gran Coupe (2018) is 221 mm (8.70 inch) longer, 22 mm (0.87 inch) wider and has 60 liters (2.12 ft3) bigger cargo space than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 105 mm (4.13 inch) higher and 417 kg (919 lbs) lighter than BMW 4 Series Gran Coupe (2018).