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Torque Sleep questions


Active Member
Nov 12, 2006
Are D owners still seeing 280-320 Wh/mile at freeway speeds? (I did a quick forum search for Wh/mile and picked those figures)

Is Torque Sleep always on, or does it only work when both TACC and Range mode are active?

Is anyone noticing changes to Wh/mile with Autopilot?


Well-Known Member
Supporting Member
Jan 31, 2014
Nomad (mostly US)
AFAIK it's only working when you turn on Rage Mode. Torque sleep shuts off one motor and only used the other one. Why is this better? The type electric motor used in a Tesla is more efficient when it's load is high (relative to it's max rating) than when it's low. In other words, it's more efficient to have just one motor run at 80% of it's max rated load than two motors run at 40% of their max rated load. The differences are not large but noticeable.
It's kind of confusing because over the last hundred years we have learned that a combustion engine runs more efficient when it's at low RPM and low load.
Well that and the fact that Tesla bills the dual motors as being more efficient with greater range. Can anyone please explain this discrepancy?

I don't have an explanation for you, sorry, but before someone jumps in with the "the motors are geared differently" theory I want to preemptively ask, has anybody at Tesla said so in print, or has anybody done a teardown of the front/rear gearboxes yet?


Nearly Insane
Apr 8, 2015
It's just the motor design, as far as I know. It's a more efficient motor, likely due to better wire windings, and less internal drag. What I would like is a clear explanation of torque sleep from Tesla, as well as the conditions it's used in. Anyone have clear data as to how (how much power is split) and when it works.


Well-Known Member
Oct 22, 2014
Ithaca, NY
Is Torque Sleep always on, or does it only work when both TACC and Range mode are active?

As for torque sleep, my recollection is that it's only active when range mode is active

AFAIK it's only working when you turn on Rage Mode.

I'm surprised there's still this much confusion about torque sleep and range mode.

Torque sleep works better with range mode on, but there are some benefits of torque sleep even with range mode off, as per Jerome Guillen:

Received a response from Jerome on a few things. (Jerome seems to be the go to guy for answers these days)

Most notably:

"Torque sleep and improved range for Dual Motor vehicles is included in versions 2.2.139 and later regardless of the selected Range Mode setting. However, the amount of this improvement will be increased by enabling Range Mode which has other vehicle control modifications in addition to the HVAC behavior."

So, no more complaining about it only working in range mode. :p

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