Hyundai Elantra GT (2018) is 342 kg (754 lbs) lighter than Opel Insignia (2015).
Opel Insignia (2015) is 502 mm (19.76 inch) longer, 288 mm (11.34 inch) wider, 32 mm (1.26 inch) higher and has 132 liters (4.66 ft3) bigger cargo space than Hyundai Elantra GT (2018).