Featured Rivian Claims R2 Matches Model Y Efficiency… Let’s See About That

Discussion in 'Prius, Hybrid, EV and Alt-Fuel News' started by Tideland Prius, Jul 27, 2026 at 5:09 PM.

  1. Tideland Prius

    Tideland Prius Moderator of the North
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    For those who don't want to watch the (hour long!) video, here's an article on it.

    Rivian R2 uses up to 26% more energy than Model Y in real-world test | Electrek

     
  2. bwilson4web

    bwilson4web BMW i3 and Model 3

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    I saw that and thanks to my past Prius efforts, I don’t throw stones but would suggest better approaches:
    • EPA roll-down coefficients - this builds on more rigorous methodology to make 2d order polynomials to compare drag forces.
    • 3 speed benchmarks define the trending polynomial - benchmark 30, 55, and 75 mph defines a performance curve.
    • Using ‘press car’ - often tuned for comfort, a poor test car compared to what the EPA and customers use.
    I have no interest in an EV pickup or SUV (nor Model Y.) I seek minimum cost to operate so sedans with a serious driver automation ‘cranks my tractor.’
    upload_2026-7-27_16-29-45.jpeg

    Bob Wilson
     
  3. hill

    hill High Fiber Member

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    Then there's the service centers. If you think Tesla SC buildout is sparse, as an example closest rivian service center to us is ~100miles further than the 200 miles away Tesla service center (turning on which roads we took).
    .
     
  4. austingreen

    austingreen Senior Member

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    For range I prioritize highway miles at the speeds I'm going. I had a 2019 model 3, and changed to a 2024 model y (to get the latest self driving hardware). On epa site the model Y is more efficient but it is less efficient in the real world on highway trips, which makes sense since the frontal area is larger. I liked the model 3 better but am happy I changed, at the time I traded it was only $10K to get a 4.5 year newer car with the latest hardware. The self driving allowed me to go from inside the garage to park this morning when I was tired and manuevered well. My dog has a more comfortable are, and my wife likes the plusher suspension, but I miss the sportier suspension and handling of the 3.

    The rivians are good vehicles but I don't believe the model Y numbers on the highway (its hot here so ac may be part of it) and trust them even less on rivians.