Porsche 913

The VW Porsche 913 was originally conceived and sketched around 2003 as a project to customize the Volkswagen Type 3 Fastback into a sportier coupe.
As a result, by combining it with the Porsche 912, it became a reality as a fictional Volkswagen-Porsche prototype to fill the missing number “913” in the model numbers of 911→912→blank→914.