BMW 4 Series (2020) is 351 mm (13.82 inch) longer, 48 mm (1.89 inch) wider and has 19 liters (0.67 ft3) bigger cargo space than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 111 mm (4.37 inch) higher and 205 kg (452 lbs) lighter than BMW 4 Series (2020).