The most powerful was the IS-2 Josef Stalin. The one with the most longevity was the Centurion (and also the most capable at the onset of WW2). The best to have seen significant service in the majority of the war was arguably the Panther.
Yes. It was the best in the world.
challenger 2 is the best tank in the world
The German World War 2 tank accelerated about 8mph.
Sherman
the German maus tank is the biggest tank of world war 2 even though only 2 were ever made but there is a bigger tank that was never made but had plans to be made it was the p. 1000 ratte tank and even bigger the p. 1500 monster tank.
The Hellcat
the tank
12
In tank factories
$40,000
69
the T-34 tank.