Certified dyno graph:

[ArthurPE]

from a pure independent test agency, not a tuner...
done for auto, motor und sport...to CERTIFY to power
steady state test, not a ramped accel run...
345 Whp...NO correction
it all depends on the dyno, and the results desired by the operator...



http://www.rri.se/spec/view/png/graph/S ... W-Nm-C.png

[Lebult]

The RS4 has about 20-25% drivetrain loss, so adding 20%, that would be exactly 414 SAE HP.
That picture isnt very big though, I can't make out the numbers on the graph.

Any idea of mods?
Or the type of dyno used?

[ArthurPE]

another, compared to the R8, no correction

http://image.automobilemag.com/f/featur ... hart_a.jpg

330 Whp....
dyno dynamics iirc

[Lebult]

Hmm, I don't see it saying WHP on there.
Do you know where this dyno was done??
NA or UK ?

[ArthurPE]

The RS4 has about 20-25% drivetrain loss, so adding 20%, that would be exactly 414 SAE HP.
That picture isnt very big though, I can't make out the numbers on the graph.

Any idea of mods?
Or the type of dyno used?

it was a stock car, off the dealers floor, submitted by auto, motor und sport to verify Audis' claims...

it made 258 KW (345 HP) at the wheels...


this site is good http://www.rri.se/
all these guys do is certification dyno testing, that's their business...

[ArthurPE]

Hmm, I don't see it saying WHP on there.
Do you know where this dyno was done??
NA or UK ?

it is uncorrected WHP, it was done at rototest, in Sweden
http://www.rototest.com/rototest-dynamometer.php

[Lebult]

Very cool. thanks.

[ArthurPE]

these white papers are very educational on dynos...losses, etc. http://www.rri.se/index.php?DN=30

[ArthurPE]

Very cool. thanks.

here's another RS4 http://www.rri.se/popup/performancegrap ... artsID=281

257 kW (349 PS / 345 bHP)

wheel, not corrected to crank

[AntoRS4]

Arthur,

please take a look at the s3... any explanation?
http://www.rri.se/popup/performancegrap ... artsID=735

[ArthurPE]

Arthur,

please take a look at the s3... any explanation?
http://www.rri.se/popup/performancegrap ... artsID=735

yep...it would appear to be significantly UNDER rated...it happens...
both S3's are about the same...it's impossible to have 0% loss, so the only logical assumption is that they are over rated...

335i, 6% in losses, only 4% torque http://www.rri.se/popup/performancegrap ... artsID=647
rumored to be under rated...

[SR71]

There is ~20hp difference between even their own tests on a 06 and 07 RS4...

[ArthurPE]

There is ~20hp difference between even their own tests on a 06 and 07 RS4...

actually 349 vs 333 ~4.8%
torque (which is what is actually measured) 277 vs 270, 2.6%

both are within 5%, which is about the repeatablity to expect...

I would call the whp on this dyno for an RS4 ~ 340...
the same as Automobile measured when comparing to an R8

[S2tuner]

ArthurPE, the Rototest is a hub dyno, not a roller dyno, so please stop talking about whp on the Rototest, as it's power at the hubs, not at the wheels+tyres.

OMG the S3 is more than overrated, it has no drivetrain losses, I didn't know that was even possible, or then Audi really give everyone a lot of BHP for free, that's nice, why are tuners still in business? I really wonder...

Anyway, what are you trying to tell us? That Audi have made a perfect engine that makes 100% of its rated horsepower, is that right?

[AntoRS4]

Arthur,

please take a look at the s3... any explanation?
http://www.rri.se/popup/performancegrap ... artsID=735

yep...it would appear to be significantly UNDER rated...it happens...
both S3's are about the same...it's impossible to have 0% loss, so the only logical assumption is that they are over rated...

335i, 6% in losses, only 4% torque http://www.rri.se/popup/performancegrap ... artsID=647
rumored to be under rated...

on my dyno i see the same...
stock s3 270hp
stock rs4 from 350 to 390hp ( depends from valve deposits )
a5 3.Tdi 240hp/250hp ( same torsen as rs4 )
bmw335i 300/310hp
if the dyno has a good software and front/rear linked axles there is no way to loose measure precision, drivetrain losses are perfectly compensated.
take a look at our dynos http://www.cmdtec.com/index.asp

about sarcasm.. i prefer it to offences