The VK 45.01 (P), also informally known as Tiger (P) or Porsche Tiger, was a heavy tank prototype designed by Porsche in Germany. With a dual engine gasoline-electric drive that was complex and requiring significant amounts of copper, it lost out to its Henschel competitor on trials, it was not selected for mass production and the Henschel design was produced as the Tiger I. Most of the already produced chassis were rebuilt as Elefant Panzerjager tank destroyers.

Panzerjäger is a term used for an anti-tank vehicle, as well as anti-tank units. The term was first used in the Wehrmacht, and also post-war by the German Federal Republic Bundeswehr. The term Panzerjäger was used in the Bundeswehr as a designation of rank.