Alfa Romeo Giulia (2019) is 59 mm (2.32 inch) wider than Opel Astra (2020).
Opel Astra (2020) is 15 mm (0.59 inch) longer, 64 mm (2.52 inch) higher, 79 kg (174 lbs) lighter and has 10 liters (0.35 ft3) bigger cargo space than Alfa Romeo Giulia (2019).
