BMW 5 Series Gran Turismo (2016) is 162 mm (6.38 inch) longer and 61 mm (2.40 inch) higher than Opel Insignia (2014).
Opel Insignia (2014) is 183 mm (7.20 inch) wider, 257 kg (567 lbs) lighter and has 40 liters (1.41 ft3) bigger cargo space than BMW 5 Series Gran Turismo (2016).