Hyundai Elantra GT (2017) is 339 kg (747 lbs) lighter than Opel Insignia (2017).
Opel Insignia (2017) is 542 mm (21.34 inch) longer, 303 mm (11.93 inch) wider, 27 mm (1.06 inch) higher and has 132 liters (4.66 ft3) bigger cargo space than Hyundai Elantra GT (2017).