BMW 7 Series (2018) is 185 mm (7.28 inch) longer and 46 mm (1.81 inch) wider than Opel Insignia Sports Tourer (2014).
Opel Insignia Sports Tourer (2014) is 35 mm (1.38 inch) higher, 260 kg (573 lbs) lighter and has 46 liters (1.62 ft3) bigger cargo space than BMW 7 Series (2018).