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Rivian's website lists the R1S 21" wheel dual motor range at 340 miles. So, the EPA numbers seem a bit better than Rivian's own published figures.
Why would you expect the dual motor version to have significantly better efficiency than a quad in Conserve? The weight differences are relatively insignificant and wind resistance is constant. Even if the Enduro motors are more efficient, the gained efficiency is still going to be limited by having the same aerodynamic profile.
I would tend agree with this….I don’t know much about the engineering or electrical architecture as none of that is in my wheelhouse but, the aero is the same so it’s going to require the same amount of energy to move it through the air. It seems it would only be able to stretch the range by having a bit fewer losses in the motors and inverters.
I don't necessarily expect them to be more efficient. I would expect however, that since there's only two of them, they would use less current than than is case with four motors. That should translate to greater range. While they do offer marginally greater range, it's quite a small improvement.
The tests are run in a lab, so no wind resistance. A correction has to be applied to the lab range numbers to simulate real world driving conditions and estimate on the road range.
I suspect that people towing will see the biggest jump in range, since Tow mode on the quad motor obligates all motors being connected, the difference is probably more comparable to what AP mode would be.
