Tesla Model S P85D Versus P85 – Video Efficiency Comparison Test


Scientific?  No, but at least we get a general idea of the efficiency differences between the Tesla Model S P85D and Model S P85 in this efficiency comparison video:

“Leg 1 of my efficiency test of my new P85D (firmware v6.0 2.0.81) and a P85 on the same route, at the same time, at roughly the same speeds.”

Though far from precise, it’s still rather easy to see which Model S consumers more energy per mile.

Efficiency Test - P85D Versus P85

Efficiency Test – P85D Versus P85

Category: Tesla

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16 responses to "Tesla Model S P85D Versus P85 – Video Efficiency Comparison Test"
  1. Mark says:

    Why do the trips have a half mile difference? Weird.

    1. Nix says:

      Different tires/wheels? More worn tires? hard to say.

  2. Chris B. says:

    This does seem to align with some (frustrated) owner posts on the Tesla forums. Apparently they are seeing significant range hits with the P85D vs. their former P85s. Tesla is supposed to release a software udpate to effectively allow one of the motors to sleep/coast at times (maybe freeway/steady state speeds, etc.) to improve this, but for now folks aren’t so stoked. The acceleration is fun, but maybe not worth the current range hit. Not sure when the software is to be released (may have been already).

  3. Bryan Whitton says:

    I am curious, how did the yellow one come about? I like it, a lot, but yellow isn’t an option on the order page.

    1. Anon says:

      Probably vinyl wrapped? *shrugs*

    2. Tesla Fan says:

      R u srs?

  4. pjwood says:

    At this point, I’d be more critical of Tesla’s tardiness in delivering a car they said would have a ‘Normal’ mode. It’s not here, yet.

    The comparison leaves the P85D stuck in ‘Sport’. So, it will be obsolete, even if it improves only marginally when the patch comes out.

    I think lots of people drew the wrong conclusion, that P85D was going to be more efficient around town. Tesla/Musk invited it with their wording, where I think the genuine excitement was only in the relative efficiency, at steady speed. He’s since come out, to verbally say highway range will about equal the P85+ (smaller front motor, than P85+, making up for the losses of a larger, “idled” rear motor, that nonetheless remains clutched in).

    1. Anon says:

      I wonder if there are sneaky nano-second timesliced ways of pulling regen off the sleeping motor that’s forced to spin? Hmmm…

    2. Bill Howland says:

      HA! We dummies assumed that because we assumed Musk would occassionally tell the truth.

      It seemed to violate laws of physics to me, but then, lots of what people believe seem to violate the laws of physics to me,

      Calling it a sleep mode motor, or a slumbering motor, or an idler, or some other cute name doesn’t change what is actually happening underneath the car.

    3. Bill Howland says:

      “…remains clutched in…..”

      I wasn’t aware of any clutches on any tesla products.

  5. JR says:

    I am still amazed that you can add 4 wheel drive and still maintain the same efficiency while horsepower and driving safety is improved

    1. ffbj says:

      Yah really. Just a markedly improved vehicle and nothing lost, only gains. In safety, traction, drive. Hard to knock it.

  6. Bill Howland says:

    I see this article is just for S owners since I have no idea what I should be looking for. It wouldn’t be too hard to leave a summary results paragraph.

    Of course I was stumped by the ERDTT even ough I’ve owned a volt for 4 years. That’s too long a pile of letters for saying the engine starts when you don’t want it to.

    Its due to engineer’s nagging propensity to abreviate at the exact time when it causes confusion.

    Of course some people over use abreviations to make themselves seem extra important.

    Not to nitpick, but the video is poor quality and I can’t read the dash.

    1. ELROY says:

      Absolutely useless not being able to read the dash.

    2. Bill Howland says:

      ONly thing I concentrated on, since I’m not familiar with an S dash, is that the 85 started out with 15 miles advantage, and ended with 22. So, that proves the p85d is less efficient, which is what would be expected.

  7. Mark says:

    The update for the front motor locking torque will be out at the end of January then do the test again