What is life like with your car? Let us know and win £500 in John Lewis vouchers | No thanks
Heaven above
I have a Road Angel speed camera detector, which displays my speed. On my Honda CRV it always read 3 mph higher than the car Speedometer. I have changed now to a Civic Type S and the Road Angel reads 5 mph lower than the digital display Speedometer. Which of the systems is likely to be closest to my actual speed?
Asked on 3 July 2010 by JP, Reading
Answered by
Honest John
On a flat straight road in clear conditions where the system can hook up to the satellites, GPS will be more accurate. On twisty, hilly roads it won't be because it measures your speed as a crow flies, across the surface of the planet. Also, anywhere it can’t pick up the satellites due to tall buildings, for example, or in a tunnel, it will compute your speed and could make a significant error. (Thanks to Peter Rodger, Chief Examiner of the IAM, for this informatioin.)
Looking for a garage you can trust? Honest John's Good Garage Guide has thousands of reader recommended garages, plus how-to guides and tips on servicing.
The Good Garage GuideSimilar questions
My Ford Focus 1.6 has done 88,000 miles. It kept showing an intermittent display fault with the odometer, speedometer, fuel gauge and temperature gauge all not working. Now none of these have worked at...
Recently the speedo has been dropping to zero for a while. Occasionally it jerks and then restarts again later.
The vehicle as been owned from new but is now a second car mostly in good working order,...
Regarding M.F. of Bath's comments about digital readout speedometers, another major advantage is the ability to switch the readout between mph and kmh. I have a 2006 Honda Civic Si with that feature (also...
Related models
Roomy and versatile. Very comfortable, pleasant and relaxing to drive. not at all cumbersome. 2.2 i-CTDI diesel is excellent.
.jpg)
