Audi A6 Allroad (2015) is 394 mm (15.51 inch) longer, 172 mm (6.77 inch) higher and has 215 liters (7.59 ft3) bigger cargo space than Mercedes AMG GT (2014).
Mercedes AMG GT (2014) is 41 mm (1.61 inch) wider and 300 kg (661 lbs) lighter than Audi A6 Allroad (2015).