What's the best engine for the A6? The biturbo v6 or the 4.2L V-8?

 

Kind of a broad question.

For tuning? Ketting the most HP out of it with the least cost. the 2.7T

For reliability? the 4.2.

I have driven both. Stock for stock you cannot notice a performance advantage of either. The 4.2 seemed to have mroe low end grunt while the 2.7 pulled harder up top.

I own a 2.7 and love it. I purchased it used so I got what was available. If I could pick between the 2 I would pick the 4.2 just for the dependability of it. Turbo cars tend to throw fits.

 

Thanks...that was my thinking as well. I love the A6, but don't know about the bi-turbo maintenance, the V-8 seems like the best choice for me. I am hoping to buy one this spring.

Thanks again..

 

get a modded a4 and youll smoke the a6 in all categories.

 

thats like sayin the a4 would smoke a modded s4....???

 

You'are wrong. A heavily modded A4 would have to come close to S4 specs to be able to beat the A6 2.7T. Add the APR chip to the A6 and the A4 will never get there regardless how many mods you do...

 

if u mod the a6 like ud mod the a4, theres no way the a4 would even see the HP the a6 would. remember the a6 has the exact same engine as the s4. u can get a nice 450+ hp outta that engine. a really nice a4 would just see 400 or so hp... weight isnt too far off on the 2 cars either...

 

modded 2.7T's have their fair share of problems. One of buddy's has an S4 and has gone through two sets of turbo's. He runs a chip, dp and exhaust, and drives autox and track. He refuses to upgrade to K04. K03 are very small turbo's and running quite a bit towards their peak efficiency so they're not going to be as reliable as a larger turbo. Audi used them to get instantaneous boost (relatively speaking) but they will treat you right if you handle them with care.

4.2 also has awesome fender flares and a smooth engine.

2.7T engine is right off the S4. A6 2.7T weighs about 100lbs more than an B5 S4 and about the same as a B6 S4. People are amazed to see A6 2.7T's on the track tearing it up. There are quite a few K04'd A6's out there with good suspension setups, tearing up the tracks.

 

I think you deserve a hand for a solid explanation. I just bought a A6 4.2L, because I have destroyed my last turbo (2000 Volvo V70 XC SE AWD Turbo for this season).Ole Tmr would have been a beast in the day

 

I love the 4.2 for the look and feel. Read up on the two. this question gets asked all of th time and there are uhundreds of thoughts on it. One will say one is fastr, then the other will say the other. Stock for Stock they are very close in power and acceleration. You realy cannot modify the V8 engine by chipping and expect any major gains. You can with the turbo. Either way your in a good league of autos.