The VK 45.01 (P) (also known as Tiger (P) or Porsche Tiger) was the official designation for an unsuccessful gasoline-electric drive heavy tank prototype produced by Porsche in Germany in 1942. It was not selected for production and the Henschel design to the same specification was produced as the Tiger I. Most of the already produced chassis were instead rebuilt as Elefant tank destroyers.
Only one tank went into service as a command tank in the Ferdinand (Elefant) unit, and served in Panzerjäger Abteilung 653. It was deployed in April 1944 and lost that subsequent July. The VK 45.01 (P)'s chassis and many of the Elefant's components were later used in developing the VK 45.02 (P) prototype heavy tank.