No there is no bias. That's maximum achievable power. There is no center diff to have said bias. Actual wheel torque depends entirely on software.
THe 470hp rear motor deliivers much higher torque than the 221hp motor. That is rear biased drive. That will affect how the car handles.
Torque steer is generated from differential drive masses, usually unequal length half shafts. They seem symmetrical all the way around on the Model S, at least from any pictures I can find. Is this not true?
Yes.
However torque steer is also generated when the tire on one side loses traction before the other, usually due to localised variation in the ashphalt, which is likely the case in the S85D and is easily sorted by Tesla traction control algorithm if they deem it necessary.
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Seem to be struggling to get the question out simply.
Two factors at play with the different models.
1. Weight
- the rear motor only models have a rear weight bias and a lighter front as there is no motor there.
- the P85D has a heavier motor at the back and some weight at the front with the smaller motor.
- the 70/85D have the same motors front and back.
Typically in a car with heavier front axle, the understeer is more difficult to control.
So does the P85 have the sharpest turn in?
Has anyone observed this?
The reality may be that the car is just so heavy due to the battery that the differences are too small to observe.
2. Power
A RWD car is typically very different to a FWD car to drive.
AWD is different again. (Modern ICE espcially Audi are using electronic trickery to modify the performance of the diffs and brakes to send torque all over the place to generate dynamic handling.
The P85 is a RWD car.
The P85D is an AWD car with a more powerful/higher torque motor a the rear
The 70/85D has same power/torque front and rear.
So it should be the case that the P85 is most RWD, then the P85D, then the 70/85D which should feel neutral.
Has anyone observed this, or again is the electronics/weight masking it so much that it cannot be observed.
(fwiw I test drove a P85+ yesterday and is felt nicely rwd, with the traction breaking occasionally on hard aceeleration leading to a nice catch by the t/c.)