BMW 1 Series (2014) is 158 kg (348 lbs) lighter than Opel Insignia (2015).
Opel Insignia (2015) is 482 mm (18.98 inch) longer, 336 mm (13.23 inch) wider, 87 mm (3.43 inch) higher and has 180 liters (6.36 ft3) bigger cargo space than BMW 1 Series (2014).