I spent 114,000 miles in a 2002 2.7t. Now have a 05 4.2. The new C6 is a much better vehicle. I know the 4.2 is faster and delivers better fuel economy when driven normal. All Audis are prone to shake when out of balance on wheels and tires. Also pulsating brakes tend to show up as the vibration you had in the 2.7. The new C6 has been much less prone to this stuff. It has vented discs front and rear. The C5 had solid discs on the rear. I had to turn rotors on old car every 25,000 and replace rotors every 50,000 miles. My new 05 has 50,000 on already and only needs pads, no disc warpage at all in 50,000 miles. Only issues I have had with the C6 has been updates to the MMI and rear trunk latch. The 2.7 at 50,000 miles had a new tranny, cam seals, ecu module, 1 brake disc truing, 1 complete brake job including disc replacement, light switch, hazard switch, 2 sets of tires- 1 set every 25,000 miles till I traded it. The C6 is much easier on tires too. 1 set will go 40,000 miles. The C6 is a way better car than my old C5. I was not even going to get another Audi, but the 4.2 absolutely won me over. Only thing that concerns me now is I am now hearing start up clatter which the dealer swears is normal with the new chain driven cams. It has a hydraulic cam chain tightener that needs pressure from the oil pump. You will love the C5 and the 4.2

 

I agree the stock C6 4.2 is considerablyfaster than the stock C5 2.7t. The C6 was a bigstep forward for Audi.

 

Isn't your car from India?

 

Congrats, you'll be happy!

 

Thanks for all the support guys...Without this resource I would not have been informed enough to makemy decision. I am very happy with my purchase.

I am impressed with the Cars power and fuel efficiency. It's hard to keepthe speedunder 80 on the freeway (as 80 feels like 35).

The only drawback that I notice about the stock 4.2 vs the stock2.7t is that the 4.2 is a bit nose heavy...You can feel this through the turns...The 2.7t seemed a bit more nimble...But the PRO's definately outweigh the CON's...

 

An even better site for the A6-C6 Audi is www.audiworld.com

More traffic over there for the new chassis.