Audi A3 (Sedan) (2019) is 376 kg (829 lbs) lighter than Opel Insignia (2017).
Opel Insignia (2017) is 384 mm (15.12 inch) longer, 288 mm (11.34 inch) wider, 82 mm (3.23 inch) higher and has 115 liters (4.06 ft3) bigger cargo space than Audi A3 (Sedan) (2019).
