Alfa Romeo Giulia (2019) is 145 mm (5.71 inch) longer, 86 mm (3.39 inch) wider, 173 kg (381 lbs) lighter and has 150 liters (5.30 ft3) bigger cargo space than Opel Ampera (2014).
Opel Ampera (2014) is 3 mm (0.12 inch) higher than Alfa Romeo Giulia (2019).