Thanks for the responses...it's tough to decide but I'm leaning towards the P85DL+ now.
Good move, You won't regret it.
I agree on the difference between 3.2 and 4.2. If I go with the P85D it needs to have the L upgrade. Just 1 sec difference is not much and a brand new car has 0 miles. So the L upgrade is really needed at this point for me to go used, unless it were a plain P85D but maybe in the mid $60Ks.
I think there is way too much focus on 0-60 times. The big advantage of the P85D (or any larger battery car) is the higher power at speed. The small battery cars (at 350 volts) run out of steam very quickly. The uncorking made them faster off the line, but once you are out on the road you will notice a big drop off above 50 or so MPH. For example, Even though the 75D and 90D have similar 0-60 times, the big battery car (at 400 volts) will blow it away at highway passing, as will an 85D, a 100D, P85 etc. Some even feel that the original 85 is faster at highway passing than an uncorked 75D (I've never driven one, so I can't vouch for that) The P85D is in a whole different league on the highway and a ludicrous model takes that even farther. It takes a lot more sustained power to accelerate from 50-90 than from 0-60 and the small battery cars just don't have it. Quickness off the line is a fun gimmick, but gobs of power to pass and merge at highway speeds is a lot more important to me.
Besides the usual advantages for new vs old (wear and tear, warranty, etc), there are a lot of little differences in the newer 2018 vs 2014 models.
The 2018 has a nice center console with storage, etc. (That was $1200 to add to my 90D)
The range of a new 75D is probably better than a 4 year old P85D.
The AP2.5 system is getting better and will continue to get improvements for years to come. The AP 1 software is not likely to get any future improvements.
I would go with the new car in this case.
I would argue that not all the changes between 2014 and 2018 are for the better
The new nose is nice, they have smoothed out some of the interior textured plastic areas and they've improved the headlights, but otherwise, I think many changes were a step back... for example
1) All non-P models now have sliding caliper brakes at the rear. That is a huge downgrade from the 4 piston fixed calipers that were standard up through 2016. All model s's are massively heavy and fast cars and should have the best brakes available, front and rear. Because the car is so quiet and smooth, it is very easy to loose track of speed and have to perform high speed panic stops. Make no mistake, sliding calipers are a huge downgrade for such an important safety feature.
2) The next gen seats were made by recaro and were awesome. They were available in leather and some were ventilated. The new "premium" seats are made in house by tesla and are not nearly as supportive or as well upholstered. In fact, you can't even get leather anymore
3) Tesla no longer offering sport suspension on performance models as noted above. The 2018 P100D has the same suspension as a 2012 60. You can get a P85D with significantly upgraded suspension and staggered wheels if you can find one made before june 2015 or so
4) AP 1 still functions better than AP2.5 and you really should try both if autopilot is important to you. AP1 feels totally natural and functions perfectly within it's limitations. AP2/2.5 has a ton more potential, but just isn't there and still feels like it has a long way to go
Other improvements such as center console and LTE can be added
everything else is pretty much the same. Same interface, displays, same computer's running everything (except autopilot), same sunroof, same stereo, same carpet, same headliner, same air suspension system, etc.
Newer doesn't always mean better
As far as range, My CPO P85D with just under 30K miles on it shows 230mi at 90% and 258mi at 100% charge, both better than my 75 or a new 75D, I will admit that it is slightly less efficient, avg around 310wh/mi compared to 290 ish but some of that is probably driving style. Also, don't overlook the supercharging speed advantage of the big battery car