Goto http://www.amoc.org/
then goto the forum and you will see.
I am not sure if you will be able to read from the forum if you are not a member, if you are then goto http://p088.ezboard.com/fastonmartinownersclub75168frm21.showMessage?topicID=319.topic
There you will find that the lap time at Nurburgring was 8min and 7secs and weighs 1570kg, the test car that did rumoured 7min 51secs was a much lighter car, not to mention that the chasis was rock hard.