In KotOR 1, I'de say maybe 30+?
Aside from that, Revan lived for well over 300 years, some believe he became Immortal. We don't know anything about his death, or even if he died at all.
--Update-- Darth Revan can be found in the novel 'Star Wars: The Old Republic - Revan' Along with a countless number of KotOR comic books.
Knights of the Old Republic Revan - 2009 was released on: USA: 23 July 2009 (AtomFilms)
Jeff Bennett voices Darth Revan in the 2011 video game.
Darth Revan is well known for being the main character in the video game "Star Wars: Knights of the Old Republic". This character went by the name Revan at first until he was inducted into the Sith by the Emperor. After the induction occurred, Darth was added as part of Revan's name.
Revan was created in 2003.
You can find an image of Revan unmasked (in The Old Republic) here: http://images1.wikia.nocookie.net/__cb20111228223841/swtor/images/4/49/FreedRevan01.jpg
Darth revan sought a Great Sith lord in the Unknown Regions of the Galaxy, and he succeeded, no one knows exactly what happens after, so we will have to wait for the release of 'Star Wars: The Old Republic' to unlock these dark secrets, and find out what fate revan had endured
If Revan is light side in both 1 and 2, then he travels into the unknown regions with T3 and never comes back. T3 comes back later and brings another of Revan's followers to help him.
You can't legitimately get Revan as a party member.
Alex Revan was born on March 22, 1978.
Alex Revan is 6' 0 1/2".
I'm not sure which Revan you are speaking of exactly... But.. Darth Revan was born somewhere between 4,000 BBY and 3,965 BBY