speedometer

[doogle47]

hi, my speedometer in my toyota van is about 10% faster than my tomtom,which one should i go by please?

 

[Andy_P]

The TomTom.

By law, speedometers in vehicles must not under-read the actual speed at all, but they are allowed to over-read. In the UK I believe it is up to 10%, other countries may have slightly different rules.

Therefore, most vehicle manufacturers deliberately set their equipment to OVER-read by about 5%.

The TomTom will only update it's speed readings around once a second, so it can be 'caught out' for a short while if you are accelerating or decelerating strongly. It will also be slightly less accurate if you are on a very steep gradient or going round a tight bend.

But in most normal driving, it will be remarkably accurate.


(p.s. Topic moved from "introductions" to "General")

 

[Arno]

speedometer in my toyota van is about 10% faster than my tomtom

Easy.
Andy gave you the dope so, if you obey the posted speed limits, following the speedometer on the Toyota, you should never get a speeding ticket.
;->)

 

[canderson]

While you're at it, please check to see if the tires on your Toyota are factory spec size or not. 10% is an uncommonly large error, and if reflected in the odometer as well, is cheating you out of a fair bit of warranty mileage.

 

[Andy_P]

if you obey the posted speed limits, following the speedometer on the Toyota, you should never get a speeding ticket.
;->)

I've never seen the point of that.
If it's legal to drive at a certain speed, I see no reason not to aspire to it.

 

[- et -]

if you obey the posted speed limits, following the speedometer on the Toyota, you should never get a speeding ticket.
;->)

I've never seen the point of that.
If it's legal to drive at a certain speed, I see no reason not to aspire to it.

"It" = A speeding ticket?

- Tom -

 

[canderson]

Y'all stay outta my left lane, Tom!

 

[Arno]

You'se folks fight for the centre and left lane while I drive past you in the completely abandoned right one.