Alfa Romeo Giulia (2018) is 17 mm (0.67 inch) wider and 116 kg (256 lbs) lighter than Opel Insignia Sports Tourer (2014).
Opel Insignia Sports Tourer (2014) is 270 mm (10.63 inch) longer, 77 mm (3.03 inch) higher and has 110 liters (3.88 ft3) bigger cargo space than Alfa Romeo Giulia (2018).