Yep I can't explain that. Even if it is the performance Model why are the gearboxes the same size? If the front motor has less torque you could make the gearbox smaller and save money and weight. I'm sticking with my prediction that the dual motor will have two smaller identical drive units
Of course you do. That's why I think Tesla will use the same RWD drive unit in the performance version. The Model 3 is supposed to be a mass production vehicle. I think it will be worth the R&D to optimize the drive unit to the application. They make multiple different drive units for the Model S/X which is much lower volume than planned for the Model 3.
They make *two* drive units for the Model S/X, which isn't that many. And I think that if they were starting from scratch now, they'd probably go for just one, and go for one motor at the front and two at the rear.
Same as any electronics purchase; Is the item I purchase today worth to me the price they are charging? If you buy for your own use this is the standard you use. You then literally can only see upside as they'll add new features via software.
Having two in the back gives practically nothing in return - just makes car less reliable.
It's overkill for most vehicle uses. Even on the racetrack (where the bar for 'overkill' raises significantly) with the M3, which isn't really a dedicated race car.
The primary advantage is that you get 50% more motor power and torque vs a two motor solution. On top of that, you get torque vectoring, which is vastly better than a limited slip differential. (Of course, you won't be able to utilize all the motor power, as you will be battery limited, but it allows you to divert power to where you have traction.)
That Model S P rear motor is an "upgrade" in the sense that it is the size of the rear-wheel only Model S motor, that the normal D variants don't get. That's why it's likely (though not assured, perhaps instead just software limited to save on hardware part variant counts) that the [non-performance] LR-D will get a smaller rear motor, while the P will get the current LR's rear wheel motor.
I need at least 500hp and carbon ceramic brakes for my commute. A standard open differential will result lose me precious seconds. Haha just kidding. Of course this is all overkill. Even a standard RWD Model 3 is overkill. If I didn't want overkill I'd buy a Nissan Leaf. The point is that to compete with the ridiculous overkill that is the BMW M3 the Model 3 is going to need a limited slip differential. Two rear motors seems like an elegant solution because it eliminates the need for any differential at all.
I just don't see any reason for developing a new rear drive unit for the dual motor Model 3, just to make the dual motor Model 3 worse, and to save a few hundred dollars in material costs.
second motor with second reduction gear and second oil pump and oil filter and commutator and cooling jacket and inverter and HV connections might not be.
A few hundred dollars on 100k+ cars is not nothing. A smaller motor/gearbox is slightly more efficient and they are already developing it for the front!
Ah, I didn't notice you are from Europe. Americans are not rational about their cars. Haha. More is always better!
I doubt it. They'll probably just use the same drive unit as the one at the rear. (Which is also what the design studio depicts, with maybe a smaller inverter.)
