1.6 CR nnnnnooooooooooooo

LPG is indeed a hard thing to compare as people buy conversions (and there are quite a few on the bandwagon) using the cheapest possible solutions which is a bad idea, and cheap can often give a bad experience.

You need to use a well supported and built system such as PRINS (dutch/japanese).

And what a typo above :-) I get about 25mpg I think, generally it costs £33 for 55Litres to go 300miles

1.8 20vT - 1781 cc inline-4 - DOHC 20v Turbo 132 kW (179 PS; 177 bhp) @ 5,500 235 N·m (173 ft·lbf) @ 1,950-5,000 AUQ 08/99–10/05 (accidentally chipped to 200 to 210bhp ish, but she is a bit old (X reg 2000) so I don't think that kind of power is left, boo)

Must avoid the Italian one, can't remember it's name, but it isn't a good purchase, or so I've heard anyway.

That's more like it, 25mpg sounds about right.