85D Actually 394 HP?

schneiderjohn · Mar 27, 2015

Took delivery on my MS 85D on March 16th and just got my registration documents back from Tesla today. Interestingly, the Tesla Certificate of Origin lists the 85D as a 394 HP vehicle, not 376 HP, as the website states.

brianman · Mar 27, 2015

Just for completeness, Model S Design Studio | Tesla Motors currently reports:

60 - 380 hp motor power
85 - 380 hp motor power
85D - 376 hp motor power / 188 hp front and rear
P85D - 691 hp motor power / 221 hp front, 470 hp rear

justaddsun · Mar 27, 2015

I would love to get the 85D on an all-wheel dyno. I'd be surprised if it didn't have 400 bhp.

krisg81 · Mar 27, 2015

justaddsun said:
I would love to get the 85D on an all-wheel dyno. I'd be surprised if it didn't have 400 bhp.

P85D on an all wheel dyno only put out 420HP or so to all 4 wheels.. but peak torque was 874lb-ft though! Interesting thing to note is it puts out just as much HP to the wheels as a standard P85 (peak) according to P85 dynos.

Denarius · Mar 27, 2015

krisg81 said:
P85D on an all wheel dyno only put out 420HP or so to all 4 wheels.. but peak torque was 874lb-ft though! Interesting thing to note is it puts out just as much HP to the wheels as a standard P85 (peak) according to P85 dynos.

The dyno used in that video only works if the front and rear wheels are mechanically linked. Since the D has two motors, not linked, it cannot measure the front motor performance, so 420HP was rear motor only.

krisg81 · Mar 27, 2015

Denarius said:
The dyno used in that video only works if the front and rear wheels are mechanically linked. Since the D has two motors, not linked, it cannot measure the front motor performance, so 420HP was rear motor only.

Then how did they measure 874 torque if both motors were not at play?

ScepticMatt · Mar 27, 2015

krisg81 said:
P85D on an all wheel dyno only put out 420HP or so to all 4 wheels.. but peak torque was 874lb-ft though! Interesting thing to note is it puts out just as much HP to the wheels as a standard P85 (peak) according to P85 dynos.

That's because that mustang dyno measured only the rear motor, which is the same as the one in the P85 as you said.
I explained it in more detail in your "85D 691HP should have an asterisk * next to it.. "Up to 691HP" thread, but you must have missed it.

Edit:

krisg81 said:
Then how did they measure 874 torque if both motors were not at play?

The P85 has been measured over 2000 pound-foot, which is obviously wrong, and so is the 874 figure.
They likely didn't account for gear ratio correctly, like on many EVs.

Tesla LIED to us! (I maxed out a dyno in my car)

krisg81 · Mar 27, 2015

ScepticMatt said:
That's because that mustang dyno measured only the rear motor, which is the same as the one in the P85 as you said.
I explained it in more detail in your "85D 691HP should have an asterisk * next to it.. "Up to 691HP" thread, but you must have missed it.

Edit:

The P85 has been measured over 2000 pound-foot, which is obviously wrong, and so is the 874 figure.
They likely didn't account for gear ratio correctly, like on many EVs.

Tesla LIED to us! (I maxed out a dyno in my car)

ah yes- I completely forgot about that P85 run w/ 2000lb-ft.

so really that P85D dyno run is about as legit as the P85 dyno run then. I also wonder if it has something to do with the dyno requiring engine RPM info.

breser · Mar 27, 2015

Imagine that Tesla reports numbers on the certificate of origin using the SAE standard based method and on the marketing material on the order form use a different measurement system and the two don't match. I don't really see this as any different than the confusion between the higher range at a constant 65 mph in ideal conditions versus the EPA rated range. Different test methods yield different results.

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85D Actually 394 HP?

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