BMW 8 Series (G14) (2020) is 46 mm (1.81 inch) wider than Opel Insignia Sports Tourer (2015).
Opel Insignia Sports Tourer (2015) is 79 mm (3.11 inch) longer, 174 mm (6.85 inch) higher, 333 kg (734 lbs) lighter and has 210 liters (7.42 ft3) bigger cargo space than BMW 8 Series (G14) (2020).