The Opel Insignia is a large family car developed and produced by the German car manufacturer Opel from 2008 to 2022. Taking its name from a 2003 concept car, the model line serves as the flagship model, slotted above the Astra and Corsa in size. The Insignia serves as the successor to both the Signum and Vectra model lines, replacing both vehicles under a single nameplate. Currently in its second generation, the model line is offered in four-door sedan/saloon body styles, five-door liftback, and as a five-door station wagon/estate.

Epsilon is General Motors' mid-size front-wheel drive automobile platform. The architecture was a multi-division project of GM North America, Opel and Saab, and debuted in the 2002 Opel Vectra and 2003 Saab 9-3. Since this platform falls squarely in the center of the worldwide automobile market, GM plans to produce a great many Epsilon vehicles with over a dozen variations. As of 2005, it was GM's highest volume worldwide platform. Even after the dissolution of the GM/Fiat partnership, both companies retain the rights to continue developing Epsilon-derived models.