Unaltered in the "the local tailor/dry cleaner hasn't touched it" sense. It's as is delivered from Zegna, unhemmed pants and all.
I'm unfamiliar with Zegna, but you're probably right in that it's not quite the standard Zegna 40, which I hear is cut a tad roomy. I think this one is slightly trimmer, as all the big measurements points (chest, jacket waist, length, pants, etc) line up exactly with 40R suits from RLPL and Kiton.
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