Subscribe to download
Leopard be good tank

And I stick with all the other accredited sources of various books that say otherwise than your one source.

A) the widespread numbers are not military assessments, and are usually acquired from absolute guesswork
B) the practical assessment of M1A1s is against modern kit 30 years newer than the M1A1s in question, with downgraded export armour packages
C) There was. the soviets put a lot of pressure on attempting to fit 140 and 152mm guns into their armour (which got nowhere because of their economic collapse)

I'm sticking with the actually reliable source.

Your account is public, sybau

So, to sum it up why I highly doubt your source:

A) All the other widespread numbers are more or less the same and are very different to what you gave.
B) Practical assesment of ukrainian servicemen judged the M1A1's armor as not sufficiant enough, what speaks against your source.
C) There was no particular historic reaction of soviet side to the off the chart armor the M1A1(HA) should have had, if the M1IP/M1A1 already had that good armor.

I am sorry to say, that those 3 reasons make me highly doubtful about the source you gave.

Again, I mean it in a very friendly and objective way and I hope ou do not feel insulted in any way.

And finally, if this was the case that the M1IP/M1A1's armor were that good compared to other tanks, and then the M1A1(HA) even better, why did I never read about the soviets trying to catch up with that intimidating armor? There was no development other than normal modernizations of tank models to compensate for that (like the US togerther with Germany did when they found out about the 125 mm gun in the T-64. They pretty much instandly declared the M60 and Leopard 1 obsolete and gave way for the MBT-70 developement, that later became the basis of Abrams and Leopard 2 developments.) There were no real stress on soviet side to counter the Abrams M1IP, M1A1 or M1A1(HA). Yes, there were developements of top attack ATGM's later, but i never read something about being the Abrams the particular reason for that.

Secondly, I always question the sources if this is even plausible what they tell me.
So, since your numbers you gave are so much off of to all the others I found, I am very suspicious. Furthermore the M1A1's armor is basically the M1IP's armor, which is an older variant of the Abrams than the 2A4 (being the 2A4 the most modern in this scenario). And since you say that the M1A1's armor is more than 50% more efficient than of the 2A4 and of the Challenger, is highly unlikely. Even so when I also found much worse numbers for the Abrams elsewhere. So the numbers for the M1A1(HA) should be through the roof then. This does not sound very plausible nor likely for me.
This also does not fit very well with the assesment ukrainian soldiers gave about the M1A1. They said that the armor of the Abrams is too weak. How could this be, if the armor according to your numbers, should be much more efficient than those of the Leopards or the Challengers?

First off, I hope I don' get misunderstood here. For me this is a friendly discussion and I try my best to be objectively. And I don't want to stress this comment section of a game mod any longer, so this will be my last entry.

So, even if you say that numbers come from the U.K. ministry of defence (which SHOULD be a reliable source, yes), I highly doubt that numbers. And I tell you why:
Whenever I look for sources, I look for many and different ones. Albeit I did this some years ago (I can't tell you the names of the book authors anymore because I forgot them, sorry), I still remember that the numbers I found were always roughly on the same scale (~700 mm KE, ~1000-1200mm HEAT for the front turret 2A4). You still can find that assesment today, whereever you look online.

I’m also pretty certain when the MoD says M1A1 they mean M1A1.

Not sure where you got “comparable”. That’s a 230mm difference.

The numbers of the M1A1 ou are speaking about is, what I found, closer to the M1A1(HA). The M1A1 and M1IP had basically the same armor. The (HA)'s armor was significantly improved and is compareable with the A4's front.