Audi A4 (2014) is 45 mm (1.77 inch) longer, 490 kg (1,080 lbs) lighter and has 130 liters (4.59 ft3) bigger cargo space than Mercedes GLC-Class (2020).
Mercedes GLC-Class (2020) is 64 mm (2.52 inch) wider and 252 mm (9.92 inch) higher than Audi A4 (2014).