Citroen C4 (2020) is 320 kg (705 lbs) lighter than Opel Insignia Sports Tourer (2017).
Opel Insignia Sports Tourer (2017) is 584 mm (22.99 inch) longer, 67 mm (2.64 inch) wider, 24 mm (0.94 inch) higher and has 152 liters (5.37 ft3) bigger cargo space than Citroen C4 (2020).