BMW 5 Series (2018) is 30 mm (1.18 inch) longer, 11 mm (0.43 inch) wider and has 9 liters (0.32 ft3) bigger cargo space than Opel Insignia Sports Tourer (2017).
Opel Insignia Sports Tourer (2017) is 14 mm (0.55 inch) higher and 115 kg (254 lbs) lighter than BMW 5 Series (2018).