Vulcans are a few times stronger than humans but in fights it often seems like they're fairly evenly matched. Chewbacca (Wookies) however are depicted as being quite a bit stronger than their human counterparts (and assuming Han Solo's suggestion that Chewie once ripped the arms out of the sockets of a man who beat him in Space-Chess.) I'd think a fight between Chewbacca and Spock (or a Wookie and a Vulcan) would fall to the Wookie's favor. If nothing else because Wookies are likely to fight dirty and viciously as opposed to the strategy and "logic" a Vulcan would fight with. Now, I wonder what a blend between the Amok Time theme and the "Duel of the Fates" piece would sound like.
Wouldn't Spock, being as smart as he is, know the fundamental maxim of the universe: "let the Wookiee win" ?
It's only a slash fic if Kirk is joining Spock on the Wookie rug. Forget that, I got a better idea - not Kirk, Han!
Is this a serious question? Vulcans are more durable than humans but they've never been depicted as having super-strength. Going up against Chewbacca would be like tackling a grizzley bear.
When Spock hit that metal pipe Kirk was holding in This Side of Paradise, he nearly bent it in half. I'd say he's pretty damn strong.
Does Spock get to use red matter? Usually it takes a moon to kill Chewbacca but I think red matter would do the trick.
In ST:3 young(er) Spock threw one of his Klingon captors (who was a big guy) about fifteen feet through the air. The shows and movies are of course wildly inconsistent. With that kind of strength, if a Vulcan or Romulan punched you it should smash your face in or collapse your rib cage.