<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:<hr /><font size="1" face="Verdana, Helvetica, sans-serif">Originally posted by Julian Lord:
<strong>Has anyone seen a technical report that suggests Alfa has designed for any particular RON?
I use 95RON (but it is probably no more than 94RON). I always understood that the ignition advance is altered by the injection system so that it is just advanced a shade over what would cause pinking and that this is constantly adjusted to give maximum performance and hence the RON (which determines the pinming advance only) is irrelevant.
I would use the cheaper unleaded (91 RON?) but 95 RON is only 22 pence/litre and I am just as baffled by the RON as anyone else though I know at heart it is not any better than the cheap stuff.
Any techno minded out there to explain it all?</strong><hr /></blockquote><font size="1" face="Verdana, Helvetica, sans-serif">The only technical document I've taken any notice of is the manual which came with my 2.0 Selespeed (page 211). It clearly states that fuel should have a MINIMUM of 95RON. Can't get any simpler than that.
I use 96 Octane (91, 96, 98 available in NZ), which is guaranteed to have a RON of at least 95.8. It's also quite a bit cheaper than 98 Octane.