Now this one has surfaced again, I must say I really don't think that the identification of #8 is right.
I have found the web page where somebody describes it as a 1997 John Deere street sweeper in Team Penske livery, but I think that was meant as a joke.
I still can't find out exactly what it is, but it has a UK registration number from 1974/75. I have checked on the DVLA website, and it is registered as a Volkswagen, manufactured 1970, first registered 8 August 1974, with engine capacity 3500 cc and coloured yellow. Unfortunately there are no other useful details.
Maybe someone has some more information. I have drawn a blank on it, but I am fairly sure it's not a John Deere street sweeper!