The following is a list of concept vehicles by German carmaker Porsche , a subsidiary of Volkswagen Group. As of September 2021, a total of 49 Porsche concepts have been revealed. 15 concepts remained unrevealed until November 11, 2020, the publish date of the Porsche Unseen , a book about the unrevealed Porsche concept vehicles from the years 2005 to 2019. [1]