BMW 7 Series (2014) is 256 mm (10.08 inch) longer than Opel Insignia (2017).
Opel Insignia (2017) is 182 mm (7.17 inch) wider, 20 mm (0.79 inch) higher, 142 kg (313 lbs) lighter and has 25 liters (0.88 ft3) bigger cargo space than BMW 7 Series (2014).