1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Speedometer discrepancy

Discussion in 'Prime Technical Discussion' started by Njner, Aug 5, 2018.

  1. RRxing

    RRxing Senior Member

    Joined:
    Jul 7, 2009
    2,521
    1,793
    0
    Location:
    NEPA
    Vehicle:
    Other Hybrid
    Model:
    Limited
    Just to repeat my previous post:
    "Actually, it is because Manufacturer's don't want the liability if the speedo should read LESS than the actual speed, and you get a speeding ticket. It typically will read about 2-3 mph high."

    To add to that, I believe there is a "United Nations" agreement that specifies this discrepancy.

    Actual speed being 2MPH lower than the speedometer reading is what I'm seeing as well.
     
    Mendel Leisk likes this.
  2. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    17,513
    10,294
    90
    Location:
    Western Washington
    Vehicle:
    Other Hybrid
    Model:
    N/A
    Yes, but nearly all the signatories to that particular UN standard (the one linked from PriusChat multiple times in the past decade) are EU and Asia-Pacific countries. None are in the North/Central/South Americas region.
     
  3. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,280
    39,038
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    How much hand-wringing can we do over this? If you're adamant to do the actual limit: "speed" by 2 mph, done?
     
  4. TonyPSchaefer

    TonyPSchaefer Your Friendly Moderator
    Staff Member

    Joined:
    May 11, 2004
    14,816
    2,498
    66
    Location:
    Far-North Chicagoland
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    For me, it’s a question of accuracy.

    “Sir, do you know how fast you were traveling?”
    “I think so, Officer. You see, the speedometer said I was driving 67, which - according to the United Nations - actually means I was driving 65.”
    “Step out of the vehicle, sir.”
     
  5. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,280
    39,038
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I guess not. :rolleyes: :ROFLMAO:
     
  6. Pierre Kay

    Pierre Kay Junior Member

    Joined:
    Aug 28, 2017
    4
    1
    0
    Location:
    Lawrenceville, NJ
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Base
    On Toyos the speed was 1 mph low according to Waze and Garmin... temporarily on Hankook 737 and now the speedometer is 2 mph low... switching to Bridgestone next week...
     
  7. Njner

    Njner Junior Member

    Joined:
    Jul 7, 2018
    18
    11
    0
    Location:
    Texas
    Vehicle:
    2018 Prius Prime
    Model:
    Plug-in Advanced
    They’re my hands, I’ll wring them if I want to! ;) But thanks for taking the time to add nothing to the discussion. (y)
     
  8. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,280
    39,038
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
  9. RRxing

    RRxing Senior Member

    Joined:
    Jul 7, 2009
    2,521
    1,793
    0
    Location:
    NEPA
    Vehicle:
    Other Hybrid
    Model:
    Limited
    That's what I would say... :whistle:
     
  10. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    7,035
    2,790
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    Adding nothing to a NOTHING discussion........
    Seems about right to me.