Not really a big deal but something I've always been curious about. If tesla offered a model S with nothing else changed except that the motor was less powerful, would that improve the range? For example if the motor was only powerful enough to push the car 0-60 in 7 seconds, would that be a more efficient motor? Would you get more range with the same battery? If so, I wonder why Tesla doesn't offer this option.
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jelloslug
Active Member
They don't offer it because it basically makes no difference. At most it's a couple of percent. Meanwhile they lose the ability to sell the car as being as cool as it is.
For comparison look at the Zero S and the Zero SR. The second one has a much bigger controller and higher rated motor. It also has exactly the same rated range, and if you software limit the torque of the faster bike to the level of the slower bike you will get exactly the same range in real life as well.
The question comes up sometimes but it's basically a carry over thought from combustion vehicles. There the performance engines are often substantially less efficient.
For comparison look at the Zero S and the Zero SR. The second one has a much bigger controller and higher rated motor. It also has exactly the same rated range, and if you software limit the torque of the faster bike to the level of the slower bike you will get exactly the same range in real life as well.
The question comes up sometimes but it's basically a carry over thought from combustion vehicles. There the performance engines are often substantially less efficient.
BluestarE3
Active Member
St Charles
Tesla, not TSLA!
I'd imagine it depends on the efficiency of the motor rather than the specific output. Though, I am sure they correlate in some way.
Nissan told me that their Leaf "drives like a Sentra" which was probably the worst sales-pitch in history.
You are correct and you can see it on the Model S page under "Electric All-Wheel Drive" by cycling between Dual, P90D, and Single motor.
davidc18
Active Member
Interesting data observation: The P90D is averaging lower energy use than our 70D on the same route at the same average speeds.
Boatguy
Active Member
For long distance driving, which is where range is really an issue, aerodynamic drag is the dominant factor and is a function of the speed you are driving, irrespective of how quickly you reached that speed. If you want more range, drive slower.
I went to a BBQ place that just opened. The lady that was directing people through the door and into the line explained "it works just like Luby's".
I haven't been able to shake the image since...
Xenoilphobe
Well-Known Member
Weight, Temperature, Drag and Speed are the biggest enemies of EV efficiency. The higher the speed, drag, weight and temperature delta (heating), the worse the range. I think the drive train is about as efficient as they can get it.. they could go to carbon fiber components and reduce weight, but that would get cost prohibitive quickly.
My understanding was that P85D have a bigger rear motor than an 85D, but not the same as a P85. The P85 has the same motor as an S85. Source: https://teslamotorsclub.com/tmc/posts/1390926/
Oops, mis-interpreted that. Yes, P85 is the same as rear of a P85D, but is also the same as an S85.
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