Just used the RAC website - just for fun, ran through the numbers of a few vehicles I have previously owned, including FAU 217L my old land rover I owned in 1986/88
Apparently this was first registered 1st January 0001 and last change of keeper was 7th June 2000 - that makes it nearly 1004 years old.
Reminds me of the joke, who owned the first car on earth - A. Moses, it says in the bible he came down from the hills in his Triumph !!!!!!