Alfa Romeo Giulia (2018) is 250 mm (9.84 inch) longer and 87 mm (3.43 inch) wider than Mercedes B-Class (2014).
Mercedes B-Class (2014) is 121 mm (4.76 inch) higher, 89 kg (196 lbs) lighter and has 36 liters (1.27 ft3) bigger cargo space than Alfa Romeo Giulia (2018).