We are talking about the character. It has been thirty years since TNG.
In the show, he played a man that was about ten years older than Stewart. Picard was about 57 when he took command of the Enterprise. He commanded it until he was about 73 before he was promoted to being an admiral.
Picard takes place about 20 years after that,as I understand the premise of the show.
If I remember the premier ST:TNG premier episode properly, they were visited by Admiral McCoy, who was 140.
-PJ