2011 Audi Q5 2.0T vs. 2004 CTT

[royxaxa]

I know there should be no match here.

but I was driving my friend's 11 Q5 2.0T with 20kkm on it. the small animal feels so strong and ready. the gas pedal feel is very smooth and turbo kicks in almost instantly on local or highway speed.

my 04 CTT with 210kkm is strong and brutal but it seems the turbo lag is rather more noticeable than that 2.0T engine.

IS there ANYTHING wrong with my CTT? I know there is no code related to engine nor transmission now with Durametric scan. the p!g is bone stock. I really take care of the car with good German oil and additives, always running on 94 gas. Diverter valves were replaced less than a year ago with OE bosch ones.

any suggestions guys? might be a time to get a tune?? or fuel pumps?

[mudman2]

hesitation is the lovely design feature of early 955s that we all hate. Many things contribute including the Egas Adaptation which can slow response to throttle. turn off PSM and drive it hard for 30 minutes and see the difference. Transmission control units can also slow response

If you want to go fast "now" knock the gears down by hand

[royxaxa]

thanks mudman, so you suggest to train the computer for aggressive driving? and maybe use the tiptronic shifting from time to time?

[mudman2]

da

[RFM]

Audi used turbochargers with variable vanes on the compressor wheels, some of them even with a mechanical charger, Roots blower, extra in front of the turbo (TFSI engines). Porsche used for your Cayenne two classic turbo's with fixed vanes on the compressor wheels, hence the difference.

[royxaxa]

not sure if i brake forum rule here, I found a website regarding the turbocharger in audi Q5

http://www.driving.ca/research-car/roadtest/Turbo+boosts+delight+Audi/3919198/story.html

it has 14.7psi boost(roughly 1.01 bar) which is higher than our boost meter max 0.8 bar. could that be part of the reason?

[mudman2]

Audi used turbochargers with variable vanes on the compressor wheels, some of them even with a mechanical charger, Roots blower, extra in front of the turbo (TFSI engines). Porsche used for your Cayenne two classic turbo's with fixed vanes on the compressor wheels, hence the difference.

So what happened with the 957 08 + where those issues disappeared ?

[RFM]

My answer was to the question of royxaxa how it is possible that such small engines are verry easy to drive. They are masters of engine downsizing,in fact complete drivetrains, with annual new engine design, power and mainly high and flat torque curves, aided by S-tronic gearboxes, advance by technic they call it. Concerning durability and subsequent technical problems are still a question mark. Porsche act a lot more conservative and doing engine upgrates step by step, the last 997 turbo's have also recieved the turbo's with variable vanes. It might wait for the Cayenne as well to have that future or an entirely new engine to replace the already old V8?

[royxaxa]

I agree with RFM. these Audi always have gradual changes here and there all the time including engine, drivetrain and styling things.

also Q5 2.0T reaches peak torque of 258 ft.lb at 1500rpm vs. 955 4.5 CTT at 2250 rpm

and it is a much lighter vehicle of 4079lbs vs. 5200+lbs of our CTT. that's 1000+ lbs of weight.

the only complain I have for the Q5 is the steering feeling is a little on the light side comparing with CTT and my wife's Audi TT