Tiger I is the common name of a German heavy tank developed in 1942 and used in World War II. The final official German designation was Panzerkampfwagen Tiger Ausf. E, often shortened to Tiger. It was an answer to the unexpectedly formidable Soviet armour encountered in the initial months of the Axis invasion of the Soviet Union, particularly the T-34 and the KV-1. The Tiger I design gave the Wehrmacht its first tank mounting the 88 mm gun, which had previously demonstrated its effectiveness against both air and ground targets. During the course of the war, the Tiger I saw combat on all German battlefronts. It was usually deployed in independent tank battalions, which proved to be quite formidable.
While the Tiger I was feared by many of its opponents, it was over-engineered, used expensive and labour intensive materials and production methods, and was time-consuming to produce. Only 1,347 were built between August 1942 and August 1944. The Tiger was prone to certain types of track failures and immobilizations, and limited in range by its huge fuel consumption. It was, however, generally mechanically reliable but expensive to maintain and complicated to transport due to its overlapping and interleaved road wheels. In 1944, production was phased out in favour of the Tiger II.
The tank was given its nickname Tiger listen by Ferdinand Porsche, and the Roman numeral was added after the later Tiger II entered production. The initial official German designation was Panzerkampfwagen VI Ausführung H (‘Panzer VI version H’, abbreviated PzKpfw VI Ausf. H), but the tank was redesignated as PzKpfw VI Ausf. E in March 1943. It also had the ordnance inventory designation SdKfz 181.