Is the c63 going to get the 5.5 V8 TT engine?
This is pure speculation but I think they are debating over one of two paths for the C AMG. The easiest would be to create another baby E class and switch to a detuned M157 in order not to offend the owner hierarchy. It would however receive the latest MCT tranny because the 7G-Tronic is obsolete, has questionable torque limitations and there is no reason to keep producing it. The other route would be to target the SLS and expand the M159 application which has already been started with the P31 package. This would make sustaining the production run for the SLS (and it’s lesser expensive sibling presumed to be in the works) more financially viable by adding a 4 door derivative into the mix. The folks at AMG should consider that this route changes the C63’s role in the lineup and provides a separation from the E63 by means of purpose rather than status. This does however open the door for the price gap to be substantially closed which I think is going to happen either way. The improvements that are coming will not be cheap and an $80,000 U.S. price point is very likely.
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Now, a big block V-8 should sound good. No big surprise there. And like other AMG 6.2-liters before it, the P31 drives magnificently. Check out the numbers we captured: 0-60 mph happens in 4 seconds. Truthfully, in 3.99 seconds, but we rounded up... Rote Sau Jr. dispenses the quarter-mile in 12.4 seconds at 114.8 mph, just a tick off what the 550-horsepower 2011 Shelby GT500 is capable of. To reiterate, this bloody red sucker is fast, and you have the M156 to thank for that fact.
And it's gone. Bye-bye, see ya, nice knowing you, auf Wiedersehen. The world has moved on. Remember, the P31 Development Package is the last hurrah for the M156. Back to why: Mercedes-Benz can't be happy with the $2,100 Gas Guzzler tax the feds slap onto this C63. Nor can AMG easily change the fact that all modern Benzes are borderline obese... Let me leave you with this: When I explained to a Mercedes engineer what this here story would be about, the parting shot of his fantastic, yet obsolete 6.2-liter V-8, he wrote back, "Couldn't agree more." And neither can we.
http://www.motortrend.com/roadtests/...est/index.html
just my .02, and it's just a guess at that
just my .02, and it's just a guess at that

Anyone lucky enough to have gotten a deeply dicounted C63 probably got the best bang for the buck that we are likely to see for a while.












