Mazda 6 Atenza (2014) is 44 mm (1.73 inch) higher and 384 kg (847 lbs) lighter than Opel Insignia (2020).
Opel Insignia (2020) is 567 mm (22.32 inch) longer, 316 mm (12.44 inch) wider and has 33 liters (1.17 ft3) bigger cargo space than Mazda 6 Atenza (2014).