cheers tcdubed for the reply; I'll start to consider the a 2.5diesel now.
I'm 21 and my grandad has a 4.6 lpg and I've fell in love with them, so I think it's my time, I've seen a 4.6 in Bordeaux with 120,000 miles 2001, wants £3000 for it, serviced up to 70,000 lpg converted. :)