Difference between P2P and Torrent. Find out here

there are a lot of dicsussions going arround this. BitTorrent itself is a Peer-2-Peer sharing but the biggest difference is that bitTorrent breaks the file in several pieces and download each piece simulataneously from those who already have downloaded that piece or the complete file. This mainly makes it faster for bigger downloads.

Check out a few of the links below:

P2P and BitTorrent what the hell's the difference?? Find out here
Peer 2 Peer
BitTorrent (Protocol)

One of the most renowned P2P client is Lime wire. Check out here how lime wire works.
and here how BitTorrent works.