BMW 3 Series Gran Turismo (2018) is 10 mm (0.39 inch) higher than Opel Insignia (2020).
Opel Insignia (2020) is 18 mm (0.71 inch) longer, 256 mm (10.08 inch) wider, 77 kg (170 lbs) lighter and has 20 liters (0.71 ft3) bigger cargo space than BMW 3 Series Gran Turismo (2018).