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+--- Thread: Speedo - accurate? (/Thread-Speedo-accurate)
Speedo - accurate? - KaDargo - 17-08-2012 11:13am
2 questions
1 - Has anyone done a proper check on how accurate the speedo really is?
2 - Does anyone use the analog dial - both my wife and myself find ourselves just using the digital readout.
RE: Speedo - accurate? - ED209 - 17-08-2012 11:22am
It will read over, the same as all cars do.
RE: Speedo - accurate? - Zesty314 - 17-08-2012 11:48am
You could check quickly using a tomtom etc. Both our Kuga and C70 show 74 at a real 70.
Cheers
Mark H
RE: Speedo - accurate? - PhilSkill - 17-08-2012 12:03pm
All cars generally read 4-5% fast by design,Hence 74 at 70 (actually 73.5 is 5%).
I find use the analog dial during normal driving, but look at the digital around speed cameras.
RE: Speedo - accurate? - Token - 17-08-2012 12:18pm
Mine is 6% over.
Only use the digital readout, no need for Analogue...
RE: Speedo - accurate? - PhilSkill - 17-08-2012 12:41pm
It's designed in to allow a tolerance for wheel/tyre differences and tyre wear (tyre wear can account for around 2% difference, gearbox/driveline differences etc on different models and options. This avoids ever selling a car that underreads and so causes an unsuspecting customer to get a speeding ticket because of the car speedo.
Imagine the litigation that could come back on a car company if that were to ever be proven, e.g if every Ford Mondeo owner that got a speeding ticket could suddenly blame the car manufactuer and claim costs!
RE: Speedo - accurate? - Barneyridge - 18-08-2012 10:23pm
I checked against my iPhone GPS and the speedo was within 2 kph.
RE: Speedo - accurate? - Sensorian - 19-08-2012 06:57am
(18-08-2012 10:23pm)Barneyridge Wrote: I checked against my iPhone GPS and the speedo was within 2 kph.
You might as well have checked it with a windsock
RE: Speedo - accurate? - Urban Splash - 19-08-2012 09:58am
I just use the digital readout. It would be great if you could make the speed reading bigger..
RE: Speedo - accurate? - Cedric - 19-08-2012 10:05am
(18-08-2012 10:23pm)Barneyridge Wrote: I checked against my iPhone GPS and the speedo was within 2 kph.
52kph = 50 actual speed
73kph = 70
124 = 120
There is also some kind of tolerance on the speed cameras in Belgium. So I can drive around 130kph on the speedo without getting a ticket (120 allowed). Most people drive around 120 on the speedo to avoid getting tickets, which gives me a comfortable speed to overtake them. Unfortunately that speed also explains my poor mpg, but I like driving at this speed.