R2 Highway Efficiency Test: 80 MPH vs 70 MPH Changed Everything

[tivoboy]

Great news, OoS just did very short but well controlled 50, 60, 70, 80mph tests vs a Model Y.

Worth noting - the 10% challenges show a much larger difference than the side-by-side runs. I think it's pretty safe to say the R2 is 20-25% less efficient than the Model Y (Performance) at any given speed. I don't see a meaningful/clear deviation as speeds increase.

One thing to note - the R2 was run on *FRESH* tires. Like ~0 miles. For the side-by-side it got better efficiency despite colder temperatures. I am thinking combination of brand new tires and wet road really did a 1-2 punch on efficiency in the 10% challenge test.

I thought when they started all of this they said the tires has ~ 1017 miles on them. Normal, IL to east or Raleigh, NC is ~ at least 850 miles?

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[Apprunner]

I thought when they started all of this they said the tires has ~ 1017 miles on them. Normal, IL to east or Raleigh, NC is ~ at least 850 miles?

You are right. The R2 has 1,000+ miles on it n

 

[Indy avocado]

You are right. The R2 has 1,000+ miles on it n

The R2 came on 20" wheels.

I don't actually know when they swapped them. Perhaps it was at the factory?

 

[Apprunner]

The R2 came on 20" wheels.

I don't actually know when they swapped them. Perhaps it was at the factory?

Yes at the factory. Jose had the 20s in the back.

 

[tivoboy]

The R2 came on 20" wheels.

I don't actually know when they swapped them. Perhaps it was at the factory?

In the first video they say “these tires should be pretty well broken in” I think he said soaked.

 

[ksurfier]

Thanks to all the debaters…and detractors. I’ve added the Out of Spec findings to the top of my original post, and they happen to align closely with my earlier analysis. I understand some people still aren’t satisfied with the OOS results, so I’d encourage them to collect their own data and see whether it produces a different outcome.

That’s the beauty of science: test it, compare results, and follow the evidence.

 

[ksurfier]

You are getting some flak on here. But your 80mph estimates were spot on.

OOS just got 2.2mpk at 80mph during their 10% challenge.

My original estimate seems to be holding true based on RivianTrackr data (6,719 miles @2.57 MPK), the R2 is averaging around 2.6 MPK which suggest 100% range is 228.8 miles (2.6 x 88), or approximately 230 miles, this also matches up with a constant highway speed in the low 70s. No doubt the winter time range will shrink depending on how cold/where the driving takes place.

For those charging to 80% and driving until 20%, this yields a usable range of nearly 140 miles. This is ~30 miles less than the Gen 1 R1 group (128 kWh pack).

So the net result is the R2 is approximately 18% more efficient than the R1. But the 45% smaller battery has a big impact and means real world usage (20-80% SOC) is 20% less range than the Gen R1.

 

[ksurfier]

While I came away impressed with my R2 test drive...this is my biggest concern. I regularly do between 70-80 on the highway and the Model Y's shape is optimized for faster cruising. My usage of FSD is steadily increasing, and also concerned about the timeline on enhancements to Autonomy + on the current architecture.

I'm looking for real world comparisons in these areas as they become available.

I’m curious if the range issue is a deal breaker for you (or not), my feeling is it will be for maybe 20-30% of reservation holders…

 

[ksurfier]

Take off 3% efficiency due to 20" Defenders* vs 22" range wheels/tires and you get 328mi.

Or use 20" AT to get 324mi

So... Yeah, that ALSO matches.

All thse variables can be modeled

*(I saw 1-2% loss going from 21" range to 20" defenders)

For the record, are you still thinking the baseline for the R2 at 70 mph is 3.0 MPK?
So far I still think it’s lower, maybe around 2.5 MPK at 70? I could see it being more like 3.0 at 65 mph…

 

[Indy avocado]

For the record, are you still thinking the baseline for the R2 at 70 mph is 3.0 MPK?
So far I still think it’s lower, maybe around 2.5 MPK at 70? I could see it being more like 3.0 at 65 mph…

I think it's ~2.92 at 68F, no HVAC.

 

[ksurfier]

I think it's ~2.92 at 68F, no HVAC.

So in ABRP, would you use the default if 245 wh/mi? I’m not sure what the value should be but pretty sure it’s not 245….maybe 300, 325, or even 350?

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