don't the 30v 2.8's have it?

 

all of the 170hp A4 1.8t's have VVT and that includes the 2001.


2001+ 1.8t Tensioner
Part number 058109088K

Pre 2001 1.8t Tensioner
Part number 058109217B


I dont think the 2.8 had VVT, the cam chain tensioners listed for the 2.8 are the same for all of the years back to 98. Well unless all A4/A6 2.8's were VVT. lol


2.8 Left Tensioner
2.8 Right Tensioner

 

As a matter of fact, they were

Maybe not the Audi 2.7 turbo, but definitely in all 98-on VW and Audi 2.8 30V...I have a 2000 Passat GLX 2.8:

http://www.motortrend.com/cars/1998/...sat/index.html

http://www.audiworld.com/model/a4/98/a4.shtml

http://www.motortrend.com/cars/1998/...ons/index.html

Same with all the 4.2 32 and 40V V8's.

 

yeah thats what i thought. around 3500 rpms, you can definitely feel more power kicking in, similar to Vtech, but less agressive, and at lower rpms. suck that honda.

 

True...actually no late peak and sudden drop in power you expect in a normally set up engine. Subtle, but noticable, because the torque is always there.

You also have a 2-stage intake manifold in the 2.8 30V (3 stage in 4.2 40V V8)...2 different lengths of intake tubes, long for lower rpms then changes to shorter for higher rpms. A fixed manifold can only reach max torque at low, mid or high rpm...never all 3.

VVT and multi-stage intake maintain a longer flatter peak to the torque curve....starts at a higher torque, then quick to the peak at lower rpms and stays near max till very high rpms and remains high until horsepower peaks...not possible before this design and better than merely adding more cubic inches, which would still be limited to a narrow range of rpms for the added peak torque.

Ingenious engineering...to get more sustained torque out of relatively small displacement plus decent gas mileage, considering performance.

 

The 1.8 do, on the awm

 

That would be the 2-stage intake, VVT does squat for performance in both the 2.8 and 1.8t.