I remember my best time being somewhere around the three hour mark. I probably couldn't do that now without a little practice. It's been a few years since I've played it!
Silent hill games usually aren't too long after the second time because you know what to do with the puzzles. Also, I'm sure there will be a point where you've beat is so many times you can't count. Like Me! Maybe 40 times?I'm replaying it again (For, like, the 8th or 9th time b/c I got the HD version on my ps3) and I'm just about done with the castle at 9 hours. (Chapter 4 or something? idk...its late and I'm lazy) I'm not sure what my fastest completion time is though...my old files all got deleted off my wii :C So I'm startin again on the ps3, sigh
(My usual completion time for games when I replay them is 10 hours...or at least it is in Silent Hill)
started in 2005
finished in 2008