Out of Spec Highway Range Test of Gen2 R1T dual Max - Nowhere near EPA

[R1Tom]

When you say there’s more drag, it demands more power: where do you suppose it comes from? The efficiency of the motors–the proportion of that the energy that goes in and mechanical force out to provide said power–absolutely matters.

It’s not whether motor efficiency matters more or less than drag if the discussion is about why your gen1 quad isn’t seeing the same range as a gen2 dual (with the same aerodynamics). Rivian literally lists officially different ranges for a reason.

(That said I’ve only seen them refer to it being “more efficient” and am not sure in what circumstances or in what ways)

Some of the difference is good old smoke and mirrors.

The dual uses a strategy to disconnect the rear motor and eliminates that parasitic loss. The quad has to manually be disconnected, bit the key here....is it can be disconnected bit the rating and testing assume it is not disconnected.

So....disconnect strategy difference between the DM and QM accounts for a fair amount if difference.

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[greyboundary]

I am not saying it doesn’t matter. I am saying in my use case, aerodynamic improvements would matter more. So far it seem that the people that are driving faster (than EPA testing) with G2 trucks on the highways aren't seeing anywhere near the gains you might be led to believe based on the EPA numbers. There is a good thread here already about someone who went from a G1 quad to a G2 dual motor and is seeing almost the same efficiency numbers. Here is a good thread for reference.

https://www.rivianforums.com/forum/...-pack-efficiency-and-charging-analysis.37135/

I drove the demo Rivians at my SC over the same routes, with both the G1 & G2 trucks/SUVs before buying my G1 quad. I didn't see any noticeable efficiency differences there. A lot of manufacturers have learned how to game the EPA test cycles anyway. Tesla is notoriously good at that and I am sure it wasn't lost on Rivian since so much emphasis is placed on range for EVs.

I'd love to see an independent test of a G2 tri motor running simultaneously on the same roads as a G1 quad motor at 76-80 mph until the battery is depleted (or at least 150-200 miles) with the same size pack. I am betting there won't be a huge difference in energy efficiency, and likely far less than what you might believe based on the Rivian EPA numbers.

Yeah, I’ve seen this thread. Also Rivian could game the EPA tests, but nevertheless, my last 1,000 mile average is 2.54 (or 355, 15 miles short of the rating) with mixed use and it’s been mostly sub 50 temps. Most of it 30s, we had a few 20s days in there.

I could see what happens when I do 80 nonstop, I’m sure it will be less good but that was kind of my original point, 80 isn’t great in any of my cars.

 

[Riviaenz]

If you drive like a turtle, you can get incredible range. If I believe my energy gauge in my G1 R1T quad, I could go almost 500 miles with my large pack at 45 mph.

How? No matter how it’s driven the range indicated in the driver display on mine is always 300mi in All Purpose or 330 conserve (@100%). I’d love it if it would adjust based on actual demand rather than percent based off EPA combined estimate.

 

[shap]

How? No matter how it’s driven the range indicated in the driver display on mine is always 300mi in All Purpose or 330 conserve (@100%). I’d love it if it would adjust based on actual demand rather than percent based off EPA combined estimate.

These are fixed numbers and do not change according to your driving style. I think what DayTripping is saying is that he can actually drive many more miles in the real world if he drives 45mph. and this is correct.

 

[DayTripping]

How? No matter how it’s driven the range indicated in the driver display on mine is always 300mi in All Purpose or 330 conserve (@100%). I’d love it if it would adjust based on actual demand rather than percent based off EPA combined estimate.

I am computing my range based on consumption times the battery capacity.

These are fixed numbers and do not change according to your driving style. I think what DayTripping is saying is that he can actually drive many more miles in the real world if he drives 45mph. and this is correct.

Exactly!

 

[greyboundary]

I do wish Rivian had a calculated range or as my Polestar calls it the “dynamic” range. It accounts for temperature and a rolling window of your driving habits.

 

[DayTripping]

Tesla does a great job in this area too. I really like their energy graph. It is phenomenally accurate in my experience.

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