Audi A4 Allroad (2018) is 333 mm (13.11 inch) longer, 38 mm (1.50 inch) wider and has 84 liters (2.97 ft3) bigger cargo space than Mercedes GLA-Class (2014).
Mercedes GLA-Class (2014) is 1 mm (0.04 inch) higher and 260 kg (573 lbs) lighter than Audi A4 Allroad (2018).