Ceedubbu

I appreciate all the feedback. The 8spd can't be adapted to the chassis supposedly. I want the W12 rear executive seating so switching to a newer S8 for me is not an option. I figured I could probably do the twin swap for 25,000 including replacing the motor with a lower k one and then have something even more unique, fun and downright badass. I'm a hot Rodder that has done lots of weird stuff so this would be right up my alley, I' m just learning the whole European thing.

mishar

I am not sure why would one want W12 TT and executive rear seating at the same time, but it doesn't go much more executive than D4:



If money is not important it probably could be done. You just need mechanically sound Bentley, hopefully totaled, warm/cooled garage and some tools, probably including TIG welder. Swapping engine, gearbox, front suspension, rear differential, exhaust, engine electronics and wiring would be just the first step. To connect that electronics to the A8 electronics you would need Audi development team to help you, or may be swap all of Bentley into A8 body, where most of it won't be plug and play. These cars are way too complicated for projects like that.

Ceedubbu

I have spoken to the lead tech on 6.0 W12's at my dealership who will help with any programming flaws and I have backing from an engineer from a major tuning company. I do love the new D4 but here is my Rationale. In Canada the W12 is rare and the only D4's I've found would probably cost me 35-40,000 more than what I would sell my D3 for and other than a few features still puts me into a vehicle with no warranty yet costly repairs. I would prefer to make mine a monster for the less. Its better to lay with the devil you know type thing.

Jack88

Just really think about it. Do it if you want, but keep in mind that it's very difficult to get it to behave as well as it would factory, and that road is littered with cars that ended up broken or worse than they started in trying to achieve that kind of goal. Also bear in mind that those modifications will be money 100% gone. The newer Audi will always have more equity than the older W12.

You could also buy my low mileage 625hp/700lbft Mercedes for $21.5. Then you have a monster V12 turbo and your executive W12.

mishar

No chance that he can help you. You are trying something that is way above any training. I am not sure if Audi development guys could help you since those are two different platforms.

On the other hand I must admit that it is nice dream. I just prefer more feasible ones.

mishar

And what is not executive enough with CL600?

richard-tx

A stock 4.0t will smoke any stock w12 in any sort of performance test/race. It doesn't matter what test you use either. 0-60mph, 0-100mph, or 1/4 mile. Start tuning that 4.0 and watch all hell break loose. 7.6 seconds 0-100 3.4 seconds 0-60. That isn't shabby for a luxury sedan.

MP4.2+6.0

Hmmm...

Having owned 'em both, gotta throw in the towel here and agree. W12 is a fabulous ride. Very special motor and engineering, and oh so smooth. But 4.0T married to two more gears is a run away. Even the stock HP #'s are clearly sand bagged, a lot. Better MPG's too. Sure you can try with a Bentley W12 and all, but incredible amounts of work, integrating electronics, will it really fit and on and on. I thought about it D4, and wish they had SWB's here. Or at least a few more 5 seaters not black on black. But it fell behind power wise too. They have already dropped like a rock used, probably more than D3 ones did at similar points in time percentage wise, but I don't perceive much of a market for them. Nice rides as always, and D4 W12 about matches A8 4.0T (only pre-chipped). But maybe about as much as you could get D3 blown with a Bentley motor and tons of dollars and hours; 2015 finally got really nice COD to reduce the gas suck. W12 may still my last hurrah again though, in a CPO D5--which they have already announced/shown motor. It will be back in the running for top dog. (At least) 8 speeds, twin blown, without a bunch of Bentley incremental steel pork. Hmmm.

Meantime, you won't find these videos for a D3 no matter what you do, V10 S8, 6.0 W12, whatever.
"More bleach" (crappy time BTW):
"What's that daddy, is that a Carrero" (w/ announcer falling silent as he chokes on his donut)": "Gonna be funny as hell" "Oh he gave up." "He's going":

Takes the half video's to make it more interesting. And sure these are most or all S8, but you get the idea. Chipped A8 4.0T isn't that far off.

Close family--where my W12 now resides--thinks it is great. Best car they ever had. But the comment from the guy who has driven most anything big block after the combo of breaking D4 loose first start with even slightly damp pavement (on what was meant to be just getting into traffic) and then just running away first opening on freeway was "Here, take the keys. Too much car for me!"