EPA Range Finalized / Published (R2 Performance)

[drivetorun]

I was just on the fueleconomy.gov website and noticed that the EPA ratings were officially published for the Performance trim of the R2 including the MPGe city vs. highway ratings. I included the Model Y Performance rating for context. It would seem like Rivian's motors are more efficient than Tesla's, but then the wind resistance comes more into play on the highway.

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[Biturbowned]

That’s honestly incredible, not sure how they did it

 

[Great Gatsby]

As a semi-long time EV owner, terms like MPGe still makes no sense to me. Give me that miles per kw, that makes a lot more sense to me so fascinating how its legit the same for both. They were not joking by any stretch of the word when they said they were benchmarking the Model Y. Incredible.

 

[UnsungZero_OldTimeAdMan]

That’s honestly incredible, not sure how they did it

All of the reductions/optimizations they said did for R2 from Gen2 R1, plus the R2's smaller size and lower weight, I would guess. And the Y may not be as optimized for efficiency as it could be, but optimized for production cost/profit.

 

[DuoRivian]

If it is 32kWh for 100 miles that equates to 3.1 miles per kWh. Given a battery size of 88.5 kWh then the range would be 276 miles. This is less than quoted, what am I missing?

 

[Dreadknight25]

All of the reductions/optimizations they said did for R2 from Gen2 R1, plus the R2's smaller size and lower weight, I would guess. And the Y may not be as optimized for efficiency as it could be, but optimized for production cost/profit.

This, Rivian is (imo) trying to maximize specs on R2 to increase demand while still (hopefully) having a profitable vehicle to create a larger customer base.

 

[UnsungZero_OldTimeAdMan]

If it is 32kWh for 100 miles that equates to 3.1 miles per kWh. Given a battery size of 88.5 kWh then the range would be 276 miles. This is less than quoted, what am I missing?

The difference between preliminary internal figures vs certified EPA numbers based on a certain test cycle? and the latter is more conservative?

 

[usulio]

That’s honestly incredible, not sure how they did it

I'm very interested for real-world range tests to come out. No matter what the EPA says, I still can't believe the R2 will come close to aerodynamic and smaller designs like Model Y. It might be that they're close under 60 mph but R2 gets much worse at 75+. We'll see.

 

[Jeremy3292]

That’s honestly incredible, not sure how they did it

I don't believe it. You can game EPA tests pretty easily. Not sure how a big box that weighs ~500 lbs more is as/more efficient as an egg Model Y with only ~12-14% bigger battery.

Need to see real world range tests.

 

[UnsungZero_OldTimeAdMan]

I don't believe it. You can game EPA tests pretty easily. Not sure how a big box that weighs ~500 lbs more is as/more efficient as an egg Model Y with only ~12-14% bigger battery.

Need to see real world range tests.

Unless you are talking about diesel-gate and other OEMs who were accused of doing similar but chose to settle without actually being pegged for cheating... there's no gaming. There are different test cycles to run that could yield different results. Any OEM can choose to submit a report to the EPA with the most favorable numbers, the most conservative, or anywhere in between the two extremes. The EPA, especially now, does not have the manpower to conduct their own tests to verify. All they do is take the reports, review them, and choose whether to certify it.

Let's get one thing straight, there isn't a single production car (EV or otherwise) that has real world numbers that match EPA-certified numbers perfectly. Instead of jumping to speculate that there is something fishy going on, once R2s are in customer hands, we will soon find out how close real world results are to this EPA-certified guidance. Guidance, that's exactly what these EPA-certified figures are. They are not iron-clad promises.

Through R1, we already know Rivian tends to be conservative with figures they submit for certification. So save the tinfoil for better uses? Cotton is more comfortable for hats.

 

[SANZC02]

I think people misjudge the drag coefficient value of the Rivian designs. It really is pretty efficient.

I have not seen numbers for the R2 but looking at the R1S Rivian does a lot of work to eliminate negative pressure areas that kill the efficiency. It is more about creating a smooth flow around the design.

Here is a comparison of the R1S:

Tesla Model X - .24
Rivian R1S - .28
Range Rover - .39

 

[Jeremy3292]

Unless you are talking about diesel-gate and other OEMs who were accused of doing similar but chose to settle without actually being pegged for cheating... there's no gaming. There are different test cycles to run that could yield different results. Any OEM can choose to submit a report to the EPA with the most favorable numbers, the most conservative, or anywhere in between the two extremes. The EPA, especially now, does not have the manpower to conduct their own tests to verify. All they do is take the reports, review them, and choose whether to certify it.

Let's get one thing straight, there isn't a single production car (EV or otherwise) that has real world numbers that match EPA-certified numbers perfectly. Instead of jumping to the speculation that there is something fishy going on, once R2s are in customer hands, we will soon find out how close real world results are to these EPA-certified guidances are. Guidance, that's exactly what these EPA-certified efficiency figures are. They are not iron-clad promises.

Through R1, we already know Rivian tends to be conservative with figures they submit for certification. So save the tinfoil for better uses?

Lmao - are you serious with this book long post? I know they used the very favorable EPA test which isn't real world. There's no need for "education" or "tin foil hat" comments. Don't take things so seriously lol. Tesla does the same.

 

[UnsungZero_OldTimeAdMan]

Lmao - are you serious with this book long post? I know they used the very favorable EPA test which isn't real world. There's no need for "education" or "tin foil hat" comments. Don't take things so seriously lol. Tesla does the same.

So you're saying your posts shouldn't be taken seriously? Got it. I'll keep that in mind.

 

[Jeremy3292]

So you're saying your posts shouldn't be taken seriously? Got it. I'll keep that in mind.

Ok boomer

 

[Great Gatsby]

Drag is a huge part of the equation, but many other factors also play in like motor efficiency and tires. The shape does not paint the whole picture.

My opinion is that the R2 will not likely hit 330 on the highway (nor is the rated range really reflecting that) but getting real world 270-300 miles depending on driving behavior is perhaps not entirely out of the question. Given the price, good enough for me but YMMV.

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