BMW X4 (2015) is 25 mm (0.98 inch) wider and 111 mm (4.37 inch) higher than Opel Insignia Sports Tourer (2015).
Opel Insignia Sports Tourer (2015) is 242 mm (9.53 inch) longer, 210 kg (463 lbs) lighter and has 60 liters (2.12 ft3) bigger cargo space than BMW X4 (2015).