Wondering if anyone knows what changes were made between the V12 Vantage vs. V12S Vantage to account for the additional 55HP?

 

since no one is responding, i'll take a shot at it...IDK...maybe the advertising department had a hand in it?

i mean, it's not as if big time automobile manufacturers are above such deception. look at volkswagen's emission deception scandal (dieselgate). much, MUCH, more substantive and yet they seemed to have had no hesitation at all in lying to the whole world about critical characteristics of their automobiles (smh). in this case, after all, what's a few HP here or there? it's not as though there is an industry-wide universally agreed upon testing mechanism for HP in automobile engines. it's pretty loosy-goosy as far as i can tell. fudging would be easy and proving intent very difficult.

 

Here's a pretty great overview.
https://astonmartins.com/car/v12-vantage-s/

 

Sounds like a lot of improvements.