BMW 3 Series Gran Turismo (2021) is 54 mm (2.13 inch) higher and has 31 liters (1.09 ft3) bigger cargo space than Opel Insignia Grand Sport (2020).
Opel Insignia Grand Sport (2020) is 71 mm (2.80 inch) longer, 34 mm (1.34 inch) wider and 215 kg (474 lbs) lighter than BMW 3 Series Gran Turismo (2021).