According to Tony Stark’s file, it stated that he took over Stark Industries in 1992. However, there seems to be a discrepancy between this information and what was portrayed in the movie Iron Man. In the film, Tony Stark was depicted as being 21 when he took over the company. If we assume that the events of Iron Man took place in the year of its release, 2008, then we can calculate Tony Stark’s birth year.
To determine Tony Stark’s age in 1992, we need to subtract 21 years from the year 1992. This would mean that Tony Stark would have been born in 1971. This calculation aligns with the information provided in Iron Man, where Tony’s age at the time of taking over Stark Industries was mentioned as 21.
It’s important to note that sometimes inconsistencies can occur in storytelling, and this could be one such case. It’s possible that the information in Tony’s file was a mistake or a retcon made after the release of Iron Man. In the Marvel Cinematic Universe, the continuity of events is often adjusted or expanded upon as new movies are released, so it’s not uncommon for minor discrepancies to arise.
In any case, the widely accepted understanding, based on the information given in Iron Man, is that Tony Stark was 21 years old when he took over Stark Industries in 1992.