Real output at the wheels.

[richy]

Just found this interesting website:

http://www.rri.se/index.php?DN=29

It lists real world rolling road outputs for standard production cars.

For example, my car produces 140PS and 138 lb ft at the wheels:
http://www.rri.se/popup/performancegraphs.php?ChartsID=161

And a standard Golf GTI produces 195PS and 213 lb ft.
http://www.rri.se/popup/performancegraphs.php?ChartsID=605

For comparison, a new BMW M3 produces 387PS and 270 lb ft
http://www.rri.se/popup/performancegraphs.php?ChartsID=768

[ourtess]

An '05 Gti gives just 181 bhp
An '06 Gti pushes out 192bhp
Whilst an '07 Edition 30 gives another 27 bhp at 219 bhp, which is 222 PS, quite close to the claimed 230 PS

The torque figures (ftlbs) are:

05 Gti  204
06 Gti  213
07 Ed30 225

Much weaker figures for the edition 30 and the earlier car than I expected.

[john_o]

seems pretty close for ED30 to me.
number is bhp @ wheels , Steve got 224 I think for his ED30 recently (same hub dyno)
whereas 230 quoted for ED30 is flywheel from VW.
So you get @ wheels value almost as high as @flywheel advertised by VW 

[isitme]

I'm quite suprised at the difference between the 05 and 06 GTi cars.

Do you think that the difference is due to updates to the software or that there is such a degree of variation between individual cars due to the manufacturing process? ie every car will have a slight % difference straight from the factory. Or would it be more reasonable to assume that the older 05 car has lost some performance through age/higher milage?

[john_o]

05 and 06 cars both had around 9k miles (cars mileag is provided in another tab)
maybe diff maps but I cant explain that size of difference either.
Looking at the graphs the 05 car looks very poor in the upper range , and looks to have well underperformed.
most of rev range looks fine 05 vs 06 , its just at top end it looks to deviate badly , maybe it had a problem?
06 car looks more normal imho

[ourtess]

Some folks say the ED30 produces 250+ bhp as standard.  Whereas the Swedes tested it at 219 bhp, which sounds true to me.

[Peskarik]

And look how S3 does not lose any power at all, and actually gains in torque!

[Peskarik]

Also, check R32. It has nothing on E30, powerwise! 

[topher]

I'm not sure what point that website is trying to get across, they're comparing measured wheel power with manufacturer's quoted flywheel power, which will only confuse people who don't understand transmission losses Especially when 4wd comes into the equation.

[ourtess]

I have a 10 year old 2.8 Z3 that I tootle around in when the sun shines.  I never thought that it produced the claimed 193 bhp.  The 177 bhp at the wheels sounds spot on.  (Makes up for the weedyness with a nice LSD).

If you own an '07 Audi RS4 it makes glum reading...

Claimed 413 bhp, measured 328 bhp

Claimed 317 ftlbs measured 270 ftlbs

If Audi are correct in their crankshaft value the transmission looses 85 bhp, ie 63 kW.  63 kW converted to heat is like having 63 granny style electric fires toasting away under the car.