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P85D - Insane acceleration

Discussion in 'Model S: Driving Dynamics' started by svp6, Oct 11, 2014.

  1. svp6

    svp6 Member

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    I did a little work on the Slashgear YouTube video shot at the launch of P85D. Acceleration is indeed insane. Presumably there were at least 3 people in the car (movie is shot from the back seat). 0-60 is ~3.7 sec. You are also at illegal residential speed in 1.5 seconds. They hit 50 mph before entering the tunnel

    Here is the graph

    Picture1.jpg
     
  2. brianman

    brianman Burrito Founder

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    Thanks for the plot. 3.73 vs. 3.2 ... hmm.
     
  3. SteveS0353

    SteveS0353 Member

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    Probably the extra mass in the back seat. I'll bet the quoted 3.2 seconds is with a skinny driver alone ;-)
     
  4. Johan

    Johan Took a TSLA bear test. Came back negative.

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    Low battery from multiple runs? Warm drivetrain?
     
  5. Saghost

    Saghost Active Member

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    With a nearly 5000 pound car, it'd take a lot of mass in the rear seat to throw the numbers off that far, but I don't have an alternate explanation (though as others have noted there are a few possibilities.) I'll be interested to see what independent instrumented testing shows - historically Tesla has underrated their cars.
    Walter
     
  6. efusco

    efusco Moderator - Model S & X forums

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    Not sure if this "embed post" will work, but The Verge posted another video of a test ride where the driver told the passengers (after reminding them to press their heads back against the headrest before launch) that with 3 people in the car 0-60 would be about 3.6 seconds. Clearly this is something Tesla had already worked out.

    Watch the video on their page:
    This is Teslas D: an all-wheel-drive Model S with eyes on the road | The Verge
     
  7. Bound466

    Bound466 Member

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    I definitely notice a hit to acceleration in my MS60 as I add each additional adult.

    I wonder if the 3.2 sec being the official figure from Tesla means that in reality it could be even less than that (with no passengers), as we've seen with the other cars. Hasn't Tesla been found to publish conservative 0-60 times compared to real world measurements? Maybe in reality it is a sub 3 second car. Yikes!!!
     
  8. EarlyAdopter

    EarlyAdopter Active Member

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    And that's undoubtedly 3 _passengers_ in the car, for a total of 4 people in those test drives. They had a lot of people at the event and would have been loading them full.
     
  9. ckessel

    ckessel Active Member

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    The mass definitely makes a difference. By myself, I can spin the P85 tires every time from a dead stop, even without fully flooring it. When I've got 5 people in the car, they don't spin at all even when I smash the pedal all the way down immediately.
     
  10. Rebel44

    Rebel44 Member

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    I would love to see 1/4 miles race with P85D against Hellcat.
     
  11. ZBB

    ZBB Emperor

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    I bet they could get a 0-60 time with no humans on board too!
     
  12. Todd Burch

    Todd Burch Electron Pilot

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    Me too. Road and Track thinks the D is faster than the Hellcat.
     
  13. Bighorn

    Bighorn Member

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    Rumors of 2.7s are circulating.
     
  14. Todd Burch

    Todd Burch Electron Pilot

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    #14 Todd Burch, Oct 12, 2014
    Last edited: Oct 12, 2014
    With Tesla's numbers typically being a bit conservative (I think I heard they use performance at 50% SOC) and word of a sub three-second test car well before the D announcement, it wouldn't surprise me.
     
  15. Johan

    Johan Took a TSLA bear test. Came back negative.

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    Anything below 3.0 seconds with a driver and road-legal tire setup would be amazing. An actual 2.7 second run would be mind boggling. Not possible IMO. The difference between 3.2 and 2.7 is like the difference between running a 100 m dash at 11 seconds blank (you're fast and can compete) vs 9.5 seconds (you can win an olympic gold medal).
     
  16. Bighorn

    Bighorn Member

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    The source is from Tesla sales personnel, though I wouldn't be surprised if it were a professional on a track with non-stock rubber.
     
  17. AnOutsider

    AnOutsider S532 # XS27

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    Model S is bigger, of course, but the Nissan GTR reportedly managed it:

    Nissan GT-R 0-60 Times - 0-60 Specs

     
  18. Johan

    Johan Took a TSLA bear test. Came back negative.

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    A professional and a track wouldn't make much difference - press the pedal and go. (Except track often have good surface, but so do many regular roads). Driver weight would mean something and optimal tires - likely 19" and quite narrow with a very sticky rubber mix would be important. Also very important is absolute 100% charge and a cold drive train (first run is typically fastest, however tires should be warmed up somehow).

    Then there's the whole methodolgy question: roll out or not? The Tesla does better vs. ICE if you measure with roll out (no penalty for roll out like and ICE that does relatively better from stand still due to built up torque in the drivevtrain being unleashed as the clutch engages).
     
  19. Bighorn

    Bighorn Member

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    #19 Bighorn, Oct 12, 2014
    Last edited: Oct 12, 2014
    The track was a concession to your assertion that it couldn't be done on street-legal tires. IIRC, there is an AMS GTR one-off that has done 1.9 seconds.

    Addendum:
    1.69s, but who's counting:)
    Nissan GTR alpha 12 0-60 in 1.69 sec - YouTube
     
  20. Johan

    Johan Took a TSLA bear test. Came back negative.

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    Just to clarify my "not possible IMO" statement: I was not referring to cars in general but to the P85D running a 2.7 (on any tires).

    But I hope I'm wrong!
     

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