tcampos
Member
OK, so, I did the return trip. Same conditions. Wind was pretty much nil. Hit some rain on the last 3rd of the leg but it didn't seem to affect power usage.
464 Wh/mi over 36.4 miles. Temp was 44F. Usage in neutral was nearly nothing according to the power usage bar.
Round trip was 76.6 miles, 36.7 kWh, 479 Wh/mi. Left with 188 rated miles. Arrived back with 70. So, 118 rated miles for 76 miles.
Since I left Devon, 150.7 miles. 66.4 kWh, 441 Wh/mi.
Now, I've made this same trip in my P85 dozens of times. Even when I was flying (90+... shhh) I barely was over 400Wh/mi.
As you can see from my graph, the road is mostly flat. I had the cruise control set the entire time at 78 MPH until I hit the off ramp. The little dip and spike near the beginning was an EzPass Express toll I slowed down to 60 for, then resumed cruise.
Suffice it to say I am so far disappointed with this purported improved AWD efficiency.
There's an interesting discussion on range in another thread here: First SF-Tahoe trip in P85D - Page 6
Long story short, MarcG posted some data on a Tahoe trip which showed some of his real world range. Since he didn't post it, I tried to reverse his Wh/m and got something in the range of 450 Wh/m which is consistent with yours - though another Tesla owner pointed out that perhaps the way I did it was flawed.
My own experience with my D has been that range is averaging 395 so far vs 350 which I used to get on my old 85, and I have not really pushed the car yet - so it will likely get worse. Tomorrow I'll be putting about 100 miles on it on the freeway so I'll get a better feel.
While the actual energy efficiency that people are getting may vary, what seems consistent is how it compares to non-D cars. I have yet to see anyone who has posted anything on range that suggests range is better.
For me, this is more than a bit disappointing - it was articles like this that encouraged me to buy the car - OFFICIAL: Tesla Model S Dual Motor (D) Unveiled -- 3.2 Second 0-60 Time, Longer Range. Autonomous Driving Hardware Now Standard
All of this was based on the D rollout on October 9 - where the direct claim was made that "the acceleration is better, the top speed is higher, [....], and the efficiency/range increases" - (see: Tesla Unveils Dual Motor and Autopilot - YouTube)
I do hope that this has something to do with a fact not yet communicated - like more of the battery has been reserved for backup capacity or perhaps that the software is just not ready yet to make things more efficient.