2.7T v 4.2 A6

[Tyson Varosyan]

It seems like a step backwards to remove a light belt and install a metal
chain. The rotational weight is the name of the game there and there is a
big difference. Nobody here needs to sing me songs about what happens when
the damn thing fails, I have 3 TT motors (Mitsu and Supra) that
snapped/skipped the belt resulting in many bent valves and cracked pistons.
I would hope that Audi would find a way to build a lighter-weight stronger
belt rather than revert to a chain drive. If you want perfect timing, gear
drive is for you.

Tyson Varosyan
Technical Manager, Uptime Technical Solutions LLC.
tyson at up-times.com
www.up-times.com
206-715-TECH (8324)

UpTime/OnTime/AnyTime

-----Original Message-----
From: S Dewitt [mailto:sdewitt at stx.rr.com]
Sent: Friday, December 31, 2004 10:10 PM
To: Matt Evans; tyson at up-times.com; 'Derek Daily'; 'Quattro at Audifans.
Com (E-mail)'
Subject: Re: 2.7T v 4.2 A6


The  B6 S4 engine looses it's timing belt in favor of chains mounted
rearward (ala vr6) and the A/C compressor, water pump and power steering are
driven via gears and shafts resulting in a much more compact engine.

The S6 engine produces 340 hp, the S8 360, and both engines use the same
replacement parts (engine and heads). I think the difference is tuning and
exhaust. I would guess that the B6 S4 is the same story.

All 2.7 TTs use the same repalcement enginesbut I think they are all rated
at the same horsepower.

Scott DeWitt
Advanced Automotion
817-939-6761
----- Original Message -----
From: "Matt Evans" <matt at mattevans.org>
To: <tyson at up-times.com>; "'Derek Daily'" <dtdaily at yahoo.com>;
"'Quattro at Audifans. Com (E-mail)'" <quattro at audifans.com>
Sent: Friday, December 31, 2004 10:57 PM
Subject: RE: 2.7T v 4.2 A6


> Is there anything especially novel about the B6 S4 engine ?  The D2 A8 4.2
> is spec'd to 300hp, the D2 S8 4.2 is specced at 360.  What makes the B6 S4
> 4.2 a 340hp motor?  How does it differ in tune from the 4.2 engine in the
> other cars ?
>
> On a similar vein, what were the differences between the B5 S4 2.7TT and
the
> A6 2.7 turbo motor ?  Were there any differences at all ?  Was the A6 a
> single turbo ?
>
> It seems like (relatively) lower displacement, forced induction, and
> mechanical AWD are a strong audi heritage, certainly for S cars.  The B6
S4
> only has one of the three.  (And honestly, it makes only 8 more hp than
the
> E46 M3 out of one additional liter, and is slower in a straight line with
2x
> the launch traction).
>
> Were the UrS4/UrS6 motors (AAN, right?) used in other Audi vehicles ?  BMW
> has the tradition that Motorsport cars get motors that only show up in
> motorsport cars, featuring significant technology changes that do not make
> it into the other engines (individual throttles being the longest running
> motorsport-only feature).  I am wondering if Audi has the same practice
> (past or present), or if their S models simply borrow an engine that is
> otherwise restricted to an uprange model?
>
>
> > -----Original Message-----
> > From: quattro-bounces at audifans.com
> > [mailto:quattro-bounces at audifans.com] On Behalf Of Tyson Varosyan
> > Sent: Friday, December 31, 2004 10:24 PM
> > To: 'Derek Daily'; Quattro at Audifans. Com (E-mail)
> > Subject: RE: 2.7T v 4.2 A6
> >
> > Some Car magazine, I think Car&Driver did a comperason
> > between the 2.7TT and
> > the V8 S4s. The conclution was that although "out of the box"
> > the V8 was
> > faster in every category (0-60, 0-100, 1/4mi), with minor
> > mods the V6TT
> > outdone the V8. With a few more mods totaling less than 10k
> > it left the V8
> > in the dust... I love turbos, I love what can be done with
> > them, I like
> > working on cars. I guess it depends on what you have in mind...
> >
> > That being said, I will drive all versons and configurations
> > of the S4 that
> > I can find before I get mine.
> >
> > Tyson Varosyan
> > Technical Manager, Uptime Technical Solutions LLC.
> > tyson at up-times.com
> > www.up-times.com
> > 206-715-TECH (8324)
> >
> > UpTime/OnTime/AnyTime
> >
> > -----Original Message-----
> > From: quattro-bounces at audifans.com
> > [mailto:quattro-bounces at audifans.com]On Behalf Of Derek Daily
> > Sent: Friday, December 31, 2004 8:00 PM
> > To: Quattro List
> > Subject: 2.7T v 4.2 A6
> >
> >
> > I have an S4 wagon.  I talked my good friend into a 4.2 with sports
> > suspension and seating.  This is the nicest all around car I've
> > driven to date.  The 2.7tt can be 'faster' in certain powerbands, but
> > for driving around town and the fwy, the A6 chassis and V8 set up is
> > great.  I've driven a number of similar (previous model) cars from
> > bmw (530, 540, M5), mbz (E430, E55), saab...this is the one IMHO.
> >
> > NOTE: Find one with the sport seats for sure...  Only issue is MPG if
> > that's a big concern, the 20mpg+ of the 2.7tt becomes more
> > intriguing.  The V8 drinks in town...fwy is better...
> >
> > DD
> >
> >
> >
> > From: "Eric Langheinrich" <eric at xmission.com>
> > Subject: 2.7 versus 4.2 A6????
> > To: <quattro at audifans.com>
> > Message-ID: <004201c4ef69$78c9c470$1500a8c0 at ISAIL>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > I'm looking to replace my current 2.8 A6 with either a 2.7T or a 4.2.
> >
> > Is there a good reason to go one way or the other?
> >
> > =====
> > Derek Daily
> > dtdaily at yahoo.com
> >
> >
> >
> >
> >
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