Dunno. Can't wait to see the first P85 (non-D) take it to a track and have it timed. It's very possible it is better. The old stock P85 416hp has already been verified by multiple independent people to be 3.9s 0-60, better than the stated 4.2. It's possible that the 470hp might take that to 3.8 or 3.7 and the only reason Tesla isn't advertising that is that the extra $15k for the P85D is only a 0.5s improvement instead of the "full 1.0second" which in reality it's not 1.0s improvement anyway. The P85D is at most 0.7 seconds faster than the original 416hp version and against likely at most 0.5 or 0.6s faster than the 470hp P85 non-dual motor version. I don't find the value in the P85D at all anymore. None of the options are included anymore and $20-$30k more cannot be justified practically.
sounds like you're trying to convince yourself not to get a P85D.
because you are saying the current P85 in fact is a 3.9 car, not a 4.2 as Tesla officially claims. and you extend that benefit of the doubt to the new P85, assuming that 54 more horsepower will result in a faster time, possibly 3.7 or 3.8.
But then you take Tesla at their word on the 3.2 seconds for the P85D. even tho there is lots of speculation that under ideal conditions, it might be closer to 3.0 (or lower).
you've also ignored the possibility that the 470hp number was the real number all along for the P85, and the are now simply acknowledging it.
all that said, I'm upgrading from a 2013 P85 to a P85D because it's a better car in almost every aspect than mine - acceleration, top speed, handling, traction, efficiency, braking, safety, ergonomics (seats), and technology. you might not find any value in that "at all", but me and most of the automotive world think it's an incredible bargain and (for my financial situation anyway) definitely worth the cost to upgrade.
Chuck