As of 2019, there have been five generations of the Astra. In a fashion typical for Opel they are designated with subsequent letters of the Latin alphabet. Opel's official convention is that the Astra is a logical continuation of the Kadett lineage, thus, the first generation of Opel Astra as the Astra F (the last Opel Kadett was the Kadett E). The usual convention would have started with Astra A, if the Astra had been considered a separate model. Models sold as Vauxhall, Holden, or Chevrolet have different generation designations reflecting the history of those nameplates in their home markets and their naming conventions.
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