BMW 1 Series (2015) is 220 kg (485 lbs) lighter than Opel Insignia Sports Tourer (2015).
Opel Insignia Sports Tourer (2015) is 584 mm (22.99 inch) longer, 91 mm (3.58 inch) wider, 92 mm (3.62 inch) higher and has 200 liters (7.06 ft3) bigger cargo space than BMW 1 Series (2015).