found one

[Michael Pederson]

Per -
As someone who's playing around with an I5 2.5 - 2.6 liter conversion at the
moment, (82mm bore, 95.5mm stroke) I'd certainly be interested in knowing if
any of these 2.4 & 2.5 liter engines were in fact gas vs. diesel power
plants; and if gas, what the bore & stroke dimensions were and/or a
crankshaft part numbers.  The Audi/VW diesel engines that I know of were/are
all 2 valve per cylinder, but I believe at least some of them were turbo
charged.

FWIW, the only "verifiable" 2.4 and 2.5 liter info I've been able to located
for VW/Audi engines pertained to VW Ag 5 cylinder diesel models - engine
codes  AAB, 2.4 liter and ACV, 2.5 liter; and the US Model front mounted
1992-1994 or 1995 (before switching to the narrow V6 configuration) Eurovan
2., which I'm given to understand were never very big sellers here in the
US.  From the Eurovan Bentley:

     Fuel   Bore    Stroke   CR     HP/or KW    Torque         Turbo
AAB  Diesel 79.5mm  95.5mm   23.0:1 57 @3700    164 @1822-2200   No
ACV    "     81.0mm    same   20.5:1 75 @3500    250 @2300rpm    Yes

AAF  Gas     81.0mm    95.5mm  8.5:1  81kW @4500  190Nm @2200     No Turbo
ACU   "      81.0mm    same   10.0:1  81kW @4500, 105 SAE BHP @4500 and
   for the ACU with dual knock sensor ECU, 190Nm @2200, 140 BHP SAE
@2200rpm,
   or with optional 95 RON unleaded 195Nm (144 ft/lb).  No turbo's were used
on either of the gas Eurovan engines per the Bentley.

I don't know why, but I would have thought +/- 1.5 CR between the AAF and
ACU engines would have made for more of a power difference than the Bentley
figures imply to me.  So far as I could determine the change in the CR was
accomplished with the pistons.  The AAF are deeply dished, while the ACU is
basically a flat top piston.

I think someone once mentioned, or suggested that some of the 2.4 and/or 2.5
gas motor info may have to do with a narrow V-5 engine that Audi &/or VW
&/or ?? were at one time playing about with.  I guess the V-5 configuration
has one bank of 2 cylinders offset between the 2nd bank of 3.  I thought
there was also an odd ball oval piston VW engine out there in somewhat the
same displacement range?

Mike

-----Original Message-----
From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of Per Lindgren
Sent: Friday, February 02, 2001 4:54 PM
To: quk at isham-research.freeserve.co.uk; quattro at audifans.com
Subject: Re: found one

isham-research.freeserve.co.uk at pop.pol.net.uk wrote:

> Not counting the
> Sport in this context, was the 3B Audi's first consumer 20V?

The engine NM seems to have started out in 1/88, this was a 20V with 160 hp
but
the "Engine Code" pages give other info, that it started 11/88. It also is a
2.0,
with 81 mm bore (no info on stroke). I've never heard of this one.

THere are a couple of other engines I've never heard of too. One is a 2.4
that
was, according to info in both the ETKA and a engine ID booklet issued by
VAG,
this engine is a 2.4 with 170 hp installed in 1989 Passat GL and GT, both
Sedan
and Variant. Anyone know this engine?

The other is a 2.5 Audi! I'll give a little story to sum this up. Ever since
I
was a kid, I've bought the German annual Magazine "Auto Katalog", a huge
buyers
guide with technical spec's for all cars marketed, year by year. In the rear
section of this catalogue, there are tables of production numbers for most
manufacturers, and often the german manufacturers give the figures broken
down in
single models.
What I have found in the 1990 catalogue is that in 1988 Audi built a 2.5
engine!
It was probably a proto but the numbers are here:

100 2.5 20V: 9 examples
200 2.5 20V: 1 example
100 2.5 20V Avant: 4 examples
200 2.5 20V Avant: 1 example

And I can also tell you that there were built 30 V8s in 1987, and 2331 V8s
in
1988.

PerL
92 Cabrio 2.3