Mazda 3 (Sedan) (2016) is 285 kg (628 lbs) lighter than Opel Insignia Sports Tourer (2015).
Opel Insignia Sports Tourer (2015) is 333 mm (13.11 inch) longer, 60 mm (2.36 inch) wider, 58 mm (2.28 inch) higher and has 141 liters (4.98 ft3) bigger cargo space than Mazda 3 (Sedan) (2016).