The question now is how does BJ compare to a tank? He is armored by the equivalent of 20 stahlhelms as evidenced by his maximum armor capacity. A 1918 stahlhelm is approximately 1 cm thick, therefore A armored BJ is equivalent to a tank with 200 mm armor plating according to Google a M4 Sherman has 76mm armor on the front glacis, putting BJ well ahead there.

But what of the Nazi tanks? A Panzer IV is the most produced Nazi tank of the war, and has 80mm front armor, well behind BJ. “But TaurusTorus” I hear you say, “that’s from the ‘30’s, what about the late war tanks?” Well to answer your question, a Panzer VIII Maus, the largest Nazi tank, has 220mm front armor, edging out New Order BJ by 20mm. Notice I said New Order, in Old Blood BJ can acquire up to 125 armor or 25 stahlhelms, or 250 mm armor, handily beating the Maus.

But a tank is more than its armor, it also has to kill things, and so does BJ. Let’s compare: a 76mm HVAP round from a Sherman can penetrate 178mm armor, a King Tiger’s 8.8cm gun can penetrate 238mm of armor. BJ’s armaments are more difficult to find statistics on, so let’s start with an easy one, in Wolf ‘09 BJ uses a Panzershreck, capable of penetrating 160mm armor, good but not exceptional. Luckily for BJ he has more in his arsenal, like the Lichenfaust. Now this, I’ll admit, is a bit of a stretch, but experimentally the Lichenfaust is the only weapon that can oneshot the Altered enemies, which can survive at least two Panzershreck rockets, to me that sounds like it is at least twice as good, placing BJ’s armor defeating capabilities at 320mm, besting the Tiger.

Other posters have pointed out that there are logistical components to a tank’s qualities, so let’s compare reliability and mobility through harsh terrain. On the first point, Tigers had a notoriously unreliable final drive requiring constant maintenance. BJ on the other hand requires only dog food for maintenance, and is capable of operating with no logistical support, and, as is seen in New Order, can kill Nazis while unconscious, waking up running them over.

As to terrain, as the Nazis discovered on the eastern front, mud is a powerful enemy to tanks, miring them, neutralizing them. BJ has never been defeated by mud, and in fact is capable of operating underwater and in space, a feature demonstrated by no tank on either side of the war.

In conclusion, the Allies had the supreme tank of WWII: BJ Blazkowicz.