Slow-Motion Video Of Tesla Model S 85D Acceleration On Snow

1 year ago by Mark Kane 14

Tesla Model S In Europe

Tesla Model S In Europe

Philippe Marseille uploaded an excellent video presenting Tesla Model S (85D – AWD) acceleration in the snow – normal and in slow-motion (10x).

Runs were done in range mode on/off and slip start on/off combinations, as well as full throttle at low speed.

The Tesla copes with snow pretty well, although as in the case of any vehicle, snow decreases range – by at least 10% according to Philippe, who shared his insights:

“With the snow we had in the past couple of days, I decided to do a couple of acceleration runs on packed snow and film them using my Nexus 6P (240fps).

Video is played at 24fps, so this is 10x slow motion.

My car is a Tesla Model S 85D (AWD) equipped with the base wheels and Nokian Hakkapeliitta R2 (non-studded) in 245-45-19

First pass is with range mode on (AKA eco mode)
2nd pass is with range mode off (AKA normal mode)
3rd pass is with range mode off and slip start on (similar to disabling traction control but since the car has 2 motors, it does not work like an AWD car with a center diff)

Last pass, I hit full throttle when in front of the camera. Range mode was OFF and Slip Start was off.

If you pump the volume, you can hear the motors / inverters modulating their output.

Couple of things I noticed :

1-With range mode, the car seems to be a bit slower to adjust power bias between front and back. This is barely perceptible when driving but is clear in the video (front wheels spins a bit before the back kicks in which make sense since I have the same motor in front and back, this is not a P85D)

2-Slip start does not have much effect... I believe it uses the G sensors of the car and since I had plenty of traction (the Nokian R2 are really nice on packed snow!), it had barely any effect. The car was spinning a bit more (look at the snow that’s been thrown by the tires in the 2nd vs 3rd run) but it’s not like it was cutting power with the setting disabled (like it does on bare ice)

3-Driving on packed snow does incur a penalty on range. At -12C, I usually average 200-205 Wh/km on this route and the Nokians, Range Mode and the HVAC at 18C. With the snow, it was more like 225-230. Car is rated for 180 Wh/km (435km of range). My battery would have lasted around 340km.”

Heating Efficiency Is Extremely Important In Cold Temperatures For BEVs

Tesla Model S P85D

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14 responses to "Slow-Motion Video Of Tesla Model S 85D Acceleration On Snow"

  1. evcarnut says:

    Let’s A Big Ass Gas Burning SUV Do that!, without ending up in the ditch!

  2. Sting777 says:

    Range mode on, the front tires are doing the work.
    Range mode off, the rears try, but the fronts take over, in snow.
    ( That’s what I see. )
    Interesting.

  3. Three Electrics says:

    For me, snow driving is all about breaking, not accelerating. All cars have all wheel breaks these days. I’d be curious to compare stop distances between a Tesla with regen braking and a similarly heavy car with only ABS.

    1. RexxSee says:

      Tesla hater? nope, Tesla minimiser today.

    2. goodbyegascar says:

      “Breaking”

      Like Breaking Bad?

      1. SparkEV says:

        LOL. I was going to say “Neat Peek much?” before I realized what you’re saying. 🙂

    3. ffbj says:

      About 20% improved stopping distance for the Tesla over conventional abs systems.

      1. SJC says:

        Source? The car weighs about 5000 pounds.

        1. ffbj says:

          I just made it up. But no really here is an example:
          http://www.edmunds.com/car-reviews/track-tests/porsche-panamera-gts-vs-tesla-model-s-track-test.html

          In this test, performed by an outfit that is typically viewed as anti-Tesla, a 2012 Model S beats, a much lighter vehicle by over 1k lbs, the Porsche Panamera, which also has better brakes.

  4. Boris says:

    I would like to see a proper test of Tesla’s all wheel drive capabilities. Something like Model S70D vs Subaru Outback vs Audi A6 Allroad.

    1. Aaron says:

      Or the Honda CR-V. Oh, that’s right, its AWD system can’t even make it up an icy hill if one of its wheels is spinning.

      This is the real advantage of AWD EVs: Motors at both ends of the vehicle instead of just one end with highly-complicated torque vectoring.

  5. pjwood1 says:

    Impressive, in Slip Start. I took AWD out in ~4 inches, with Mich X-Ice. Having done TC-off w/RWD, this was an entirely different experience. In turns, Tesla’s AWD does a fantastic job of just beginning to drift to the outside, before immediately limiting power. I’m more convinced Tesla simply limits power until the steering wheel is nearly straight again (you can get this effect in the dry, if you push hard enough). The video shows how much power comes back, when straight.

    I also noticed rear stability control not kicking in unless the tail is a good 10-15 degrees out. Its plain HARD, to tease the rear out that far with AWD, anyway. On an empty, snow covered, traffic circle, deliberate attempts to get fish-tailing were mostly subdued by the front constantly pulling the car out of them. Go too fast, and steering goes away, you slow down after a bit of understeer and you’re on your way.

    An incredibly safe car, in snow. My opinion.

    1. ffbj says:

      And, as you point out, extremely flexible.

  6. R3D says:

    I’m more interested in decceleration / braking rather then acceleration which is more important and bigger challenge with that weight.