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Speedo reading and mileage |
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Grumpy GrandPa |
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Member No: #10746
Joined: Aug 28 2009Location: Hull: UK City of Culture 2017 |
The speedo readout on my old C4 used to be spot on: indicated 70mph was also 70mph on the SatNav even after 165,500 miles My newer, 2011, C4 VTR+ seems to be out (and, yes, it does have the correct profile tyres) as it reads 73 mph when the SatNav states 70 mph. I can live with that, annoying though it is, but my question is ... is the mileage travelled read differently and so is correct or is that also inaccurate??? |
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BigJohnD |
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Member No: #82
Joined: Jan 22 2007Location: Hoylake |
Grumpy GrandDad wrote ... The speedo readout on my old C4 used to be spot on: indicated 70mph was also 70mph on the SatNav even after 165,500 miles My newer, 2011, C4 VTR+ seems to be out (and, yes, it does have the correct profile tyres) as it reads 73 mph when the SatNav states 70 mph. Likewise… |
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Grumpy GrandPa |
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Member No: #10746
Joined: Aug 28 2009Location: Hull: UK City of Culture 2017 |
The mileage seems to agree with the SatNav on a couple of 5 mile sections of my journey today . . . . . Have to try on a longer journey with the SatNav and see of it is accurate over longer distances |
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yovavb |
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Member No: #14234
Joined: Jun 19 2010Location: israel |
the old one was reading +1 KPH more, the new one reading is +5 KPH more. this is the case with a lot of cars as the law is that the reading of the speedo cannot be less than the real speed. so most manufacturers calibrate the speed readings to about 5 KPH higher |
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rusky |
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Member No: #27768
Joined: Oct 13 2012Location: Hove |
I think the offset can be changed in the BSI not that it's worth doing! | ||
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