Interesting link on Engine Codes...

[isham-research.freeserve.co.uk at pop.pol.net.uk]

> UK was slow to introduce strict emissions standards. That's why you are
> more familiar with engines like KG, MB and 1B, Phil. They all don't have
> any emissions control stuff and are designed to operate on 98 leaded fuel.

It's taken me three years dedicated work to nail this one.  PLEASE
don't start it all up again.

No Audi engine has needed lead for at least two decades.  The MB and 1B
specifications SPECIFICALLY state '95 RON unleaded'.

> A side note to our American listers: the reason why early US-spec Audis are
> detuned in comparision to their European counterparts is because USA was
> first to introduce strict emissions regulations, banning leaded fuel and
> requiring all cars to have cats, 02 sensors AND to be able to run on 92 RON
> fuel.

US octane ratings are different from European ratings.  European 95 RON
is usually the same as US 91 octane - the North American rating is
actually AKI (anti-knock index) and is the arithmetic mean of RON and MON.

In Europe, MON is not published for most fuels but tends to be in the
high 80s.

We're using the same fuel.

--
 Phil Payne
 UK Audi quattro Owners Club
 http://www.isham-research.freeserve.co.uk/quattro
 Phone +44 7785 302803   Fax: +44 7785 309674