BMW 4 Series (2020) is 138 mm (5.43 inch) longer and 74 mm (2.91 inch) wider than Mercedes CLA-Class (2016).
Mercedes CLA-Class (2016) is 55 mm (2.17 inch) higher, 115 kg (254 lbs) lighter and has 30 liters (1.06 ft3) bigger cargo space than BMW 4 Series (2020).