Timo said:
I always kinda thought that the Jenolen that Scotty was trapped aboard in TNG's "Relics" was a 23rd-Century runabout myself.
...Despite having exterior detail to establish her as basically equal in size to Kirk's Enterprise?
Yes, because the actual scale of the ship is questionable, IMO. While I do think the Sydney-class is a much larger design than the Danube-class, I disagree that it's equal in size to a Constitution-class. At best, it's about a third of the size to me, making it about right for a personnel transport or a heavy runabout.
I'd think the warp engines would already be a telltale.
But we've seen shuttlecrafts with starship-style warp engines in both the 23rd-Century (Star Trek V) and the 24th-Century, simply scaled down. To me, that's the case here.
That beastie was hundreds of meters long, with a cavernous aft shuttlebay capable of taking aboard a fleet of runabouts. But admittedly the ship was never seen in a good closeup.
And I guess that leads to a difference of opinion about its scale. To me, the ship looked smaller than a Nova-class vessel and was barely more than 100 meters long with about four to six decks...