Alfa Romeo Giulia (2019) is 224 mm (8.82 inch) longer, 77 mm (3.03 inch) wider, 141 kg (311 lbs) lighter and has 45 liters (1.59 ft3) bigger cargo space than Mercedes B-Class (2020).
Mercedes B-Class (2020) is 126 mm (4.96 inch) higher than Alfa Romeo Giulia (2019).