It's an original Ford GT 40, from the mid to late 1960's. It was built as a LeMans endurance race car, first and formost. The fact that a few made it on the road was almost incidental.
This particular one is either a genuine Mk II version (circa 1966) or a replica of same.
It is not the newer, 2005 version which was made in limited numbers.
http://en.wikipedia.org/wiki/Ford_GT40