BMW 3 Series Gran Turismo (2021) is 20 kg (44 lbs) lighter than Opel Insignia Sports Tourer (2017).
Opel Insignia Sports Tourer (2017) is 87 mm (3.43 inch) longer, 27 mm (1.06 inch) wider, 4 mm (0.16 inch) higher and has 39 liters (1.38 ft3) bigger cargo space than BMW 3 Series Gran Turismo (2021).