BMW 1 Series (2014) is 100 kg (220 lbs) lighter than Opel Insignia Sports Tourer (2015).
Opel Insignia Sports Tourer (2015) is 553 mm (21.77 inch) longer, 108 mm (4.25 inch) wider, 102 mm (4.02 inch) higher and has 200 liters (7.06 ft3) bigger cargo space than BMW 1 Series (2014).