Satnav speed accuracy

Discussion in 'UK Motorcycles' started by Danny, Jul 28, 2008.

  1. Danny

    AndrewR Guest

    My counter-argument is that my old company Rover 214SLi would sit all day on
    the motorway with the needle a gnats whisker under 100mph.

    One day a nice man in his company car followed me and gave me a ticket
    verifying that my actual speed was 96.5mph, which was jolly useful and only
    cost £40[1]. He even commented, "I bet you were sitting with your speedo at
    99mph and you've got good throttle control 'cos it didn't waver for the
    whole mile I followed you".

    [1] I believe it's gone up since then.

    --
    AndrewR, D.Bot (Celeritas)
    Aprilia RSV-1000R, Honda VFR750F-L, Kawasaki ZX-6R, Fiat Coupe 20v Turbo
    BOTAFOT#2,ITJWTFO#6,UKRMRM#1/13a,MCT#1,DFV#2,SKoGA#0 (and KotL)
    BotToS#5,SBS#25,IbW#34, DS#5, COSOC# Suspended, KotTFSTR#
    The speccy Geordie twat.
     
    AndrewR, Jul 28, 2008
    #21
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  2. Danny

    SD Guest

    Both my GPS V and Zumo 550 read 75 at 75 on the speedo of the Wing.

    When the Zumo's reading 75, the Blackbird is usually indicating over
    eighty.

    It's got dozens on there.
    --
    | ___ Salad Dodger
    |/ \
    _/_____\_ GL1500SEV/CBR1100XXX/CBX1000Z
    |_\_____/_| ..98154../..30234.../..32080.
    (>|_|_|<) TPPFATUICG#7 DIAABTCOD#9 WG*
    |__|_|__| BOTAFOT #70 BOTAFOF #09 PM#5
    \ |^| / IbW#0 & KotIbW# BotTOS#6 GP#4
    \|^|/ ANORAK#17 IbB#4 YTC#4 two#11
    '^' RBR Clues: 42 Pts:0695 Miles:2498
     
    SD, Jul 28, 2008
    #22
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  3. Danny

    wessie Guest

    and what a pile of crap those early Delco speedos were. My employer had a
    contract to assemble the electronics from a kit of parts sourced by GM. Our
    own stuff was pretty cheap & nasty but GM took it to the ultimate level...
     
    wessie, Jul 28, 2008
    #23
  4. Danny

    SD Guest

    You mean I didn't really hit a maximum of 313mph on the A10 south of
    Paris in 2004?

    Bum.
    --
    | ___ Salad Dodger
    |/ \
    _/_____\_ GL1500SEV/CBR1100XXX/CBX1000Z
    |_\_____/_| ..98154../..30234.../..32080.
    (>|_|_|<) TPPFATUICG#7 DIAABTCOD#9 WG*
    |__|_|__| BOTAFOT #70 BOTAFOF #09 PM#5
    \ |^| / IbW#0 & KotIbW# BotTOS#6 GP#4
    \|^|/ ANORAK#17 IbB#4 YTC#4 two#11
    '^' RBR Clues: 42 Pts:0695 Miles:2498
     
    SD, Jul 28, 2008
    #24
  5. Danny

    Higgins Guest

    wessie wrote:
    Seems to be a bit of a trait with GM. We were looking at new cars at the
    weekend and it seems that GM have managed to remove that quality feel
    from SAABs. The general feel just didn't hold a candle to Volvo or
    Volkswagen.


    [1]Just don't
     
    Higgins, Jul 28, 2008
    #25
  6. Danny

    wessie Guest

    I thought that GM was edging upmarket, or is that just the Vauxhall brand
    being distanced from GM Daewoo, aka Chevrolet?
     
    wessie, Jul 28, 2008
    #26
  7. Danny

    Higgins Guest

    I'm no expert, so it's only the impression I took away at the weekend
    and it seems to be supported by the SAAB forums[1]. We haven't looked at
    Opel so can't comment on how they compare.

    [1]With the usual caveat about forums for enthusiasts.
     
    Higgins, Jul 28, 2008
    #27
  8. Danny

    Champ Guest

    That's cos it was flat out, wasn't it.
    --
    Champ

    ZX10R | GPz750turbo | GSX-R 600 racer
    My advice as your attorney is to buy a motorcycle
    To email me, neal at my domain should work.
     
    Champ, Jul 28, 2008
    #28
  9. Danny

    Pip Luscher Guest

    Hybrid pixies cross-bred with elves for the display. Pixelves, I think
    they're called.
     
    Pip Luscher, Jul 28, 2008
    #29
  10. Danny

    Pip Luscher Guest

    FWIW my Guzzi used to under-read by 8% until I replaced the speedo. It
    now over-reads by 8%. R1 over-read by almost exactly 10% initially,
    but when I returned it to stock gearing, I calculated that it dropped
    to 8%. This measurement achieved with the aid of a long straight road
    (we've lots of those round here), a stopwatch and an OS map.

    'Cos I'm a bit sad. Next question?
     
    Pip Luscher, Jul 28, 2008
    #30
  11. Danny

    Higgins Guest

    Oh yes, SWMBO was particularly taken by the seats in the Aero TTiD, or
    whatever the abbreviation is, but it's just a tad over budget even
    VAT-free with discount.
     
    Higgins, Jul 28, 2008
    #31
  12. Danny

    AndrewR Guest

    No, on the local speed test route[1] it batted a truly amazing indicated
    130, suggesting that even if the speedo was fairly accurate at 100 it gave
    up the ghost shortly thereafter.

    [1] The M45[2]
    [2] "The greatest danger speeding on the M45 is that you might hit a sheep
    grazing in the outside lane", J. Clarkson

    --
    AndrewR, D.Bot (Celeritas)
    Aprilia RSV-1000R, Honda VFR750F-L, Kawasaki ZX-6R, Fiat Coupe 20v Turbo
    BOTAFOT#2,ITJWTFO#6,UKRMRM#1/13a,MCT#1,DFV#2,SKoGA#0 (and KotL)
    BotToS#5,SBS#25,IbW#34, DS#5, COSOC# Suspended, KotTFSTR#
    The speccy Geordie twat.
     
    AndrewR, Jul 28, 2008
    #32
  13. Danny

    Higgins Guest

     
    Higgins, Jul 28, 2008
    #33
  14. Danny

    Higgins Guest

    <stereotypes 'r' us>

    I don't think I'm enough of a **** to go that route.

    </sru>

    I do have a bit of a Scottish quandary in that I've never bought a new
    car in my life, almost as a point of principle. On the other hand, the
    deals are so good that the thought of a bargain is dragging me in that
    direction.

    The aforementioned V70 @ ¤28k seems to be commanding around ¤23k[1] at
    three years old. That's the sort of depreciation rate I like.

    [1]Allowing for the disparity between asking and actual selling prices.
     
    Higgins, Jul 28, 2008
    #34
  15. Danny

    Champ Guest

    I had a 214 of some generation or other, and the speedo never got near
    a number like that.
    heh. The M45 is truly amazing, isn't it. It goes from nowhere to
    nowhere.

    --
    Champ

    ZX10R | GPz750turbo | GSX-R 600 racer
    My advice as your attorney is to buy a motorcycle
    To email me, neal at my domain should work.
     
    Champ, Jul 28, 2008
    #35
  16. Danny

    platypus Guest

    You should stick with the Great Red Shark. It's not a bad-looking car.
     
    platypus, Jul 28, 2008
    #36
  17. Danny

    geoff Guest

    My pikey michelin one does that

    I wish it could at least get the road speed right on occasions
     
    geoff, Jul 29, 2008
    #37
  18. Danny

    Ace Guest

    Our TomTom Go XL has the same feature, but it's certainly
    user-selectable. Can't remember OTTOMH how, but I'll try it later to
    see.

    --
    _______
    ..'_/_|_\_'. Ace (b.rogers at ifrance.com)
    \`\ | /`/
    `\\ | //' BOTAFOT#3, SbS#2, UKRMMA#13, DFV#8, SKA#2, IBB#10
    `\|/`
    `
     
    Ace, Jul 29, 2008
    #38
  19. Danny

    Ace Guest

    I'm still waiting for my 'something silly'[1][2] to be built. Roll on
    September.

    [1] R36.
    [2] Mebbe not everyone's idea of silly, but it tickle my silly-bone,
    to be sure.
    --
    _______
    ..'_/_|_\_'. Ace (b.rogers at ifrance.com)
    \`\ | /`/
    `\\ | //' BOTAFOT#3, SbS#2, UKRMMA#13, DFV#8, SKA#2, IBB#10
    `\|/`
    `
     
    Ace, Jul 29, 2008
    #39
  20. Danny

    Ace Guest

    Doh! It's a "One XL", not a Go.

    --
    _______
    ..'_/_|_\_'. Ace (b.rogers at ifrance.com)
    \`\ | /`/
    `\\ | //' BOTAFOT#3, SbS#2, UKRMMA#13, DFV#8, SKA#2, IBB#10
    `\|/`
    `
     
    Ace, Jul 29, 2008
    #40
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