High Quality Content by WIKIPEDIA articles! The Premium platform is General Motors`s and Fiat Group`s high-end automobile platform. The architecture debuted in production form with the Alfa Romeo Brera, was used earlier Opel Insignia (concept car) in 2003 and Alfa Romeo Visconti (concept car) in 2004. Even after the dissolution of the GM/Fiat partnership, both companies retain the rights to continue developing Premium-derived models, though no GM versions are known.