BMW 7 Series (2018) is 256 mm (10.08 inch) longer than Opel Insignia (2020).
Opel Insignia (2020) is 182 mm (7.17 inch) wider, 20 mm (0.79 inch) higher, 202 kg (445 lbs) lighter and has 26 liters (0.92 ft3) bigger cargo space than BMW 7 Series (2018).