a standard door can range in size.
the one we built is 31-1/2" wide without the CP, so it might fit thru a 2-8 width door, by removing the door, unless the door can open and hopefully not have to remove the door stops.
i guess a standard interior door width would be 2-4 to 2-8, but could be wider or narrower.
we could have made the cabinet a couple inches narrower and still fit the 27" tv.