speedo readings

spiderpig37 · 30-10-2012, 15:44

Does anybody know how far out the speedo reads
My reason for asking is i got a speeding ticket in the post today saying i was clocked doing 47 in 40 zone saw the van at the time and thought i was in a 50zone so i would have been doing just under 50 can remember telling the kids to smile for the camera
Just suprised its come in at 47mph when i thought the speedos read quite a bit out

arcascomp · 30-10-2012, 16:13

Run a GPS to get a more accurate speed reading, mines about 10% or thereabouts, either that or Inverness has moved further north since the last time I went there!

It'll depend on a number of things including how big the outside circumference of your tyres are.

briggie · 30-10-2012, 16:47

yep , depends whether you have standard tyres or not , but the t2 speedo normally reads high

Terranical · 30-10-2012, 17:55

Mine reads about 10% fast as well compared with the GPS reading of my Talex - it's on standard wheels & tyres.

supergnome · 30-10-2012, 18:09

36 on clock is 30 on mine, 47 is 40. David.

micktheshed · 30-10-2012, 18:43

Quote:

Originally Posted by supergnome

36 on clock is 30 on mine, 47 is 40. David.

Mine is the same, but strangely, distances are fairly accurate.
Thought they were required by law to be accurate within +10%-0%, which makes this (& my previous Frontera) illegal: ie. 33mph @ 30 NOT 36 which is +20%!! This IS on 1/3 worn original tyres! Though it does get more accurate with speed, eg. 64 @ true 60mph (perhaps it reads true @ 100+?).

This explains why I've gone through speed traps several times & got away with it, & why everyone was passing me & sometimes giving me dirty looks LOL. At least it reads zero when I'm standing still which my Frontera didn't always manage to do LOL (sometimes showed 30 or more!).

Now I ALWAYS have the satnav on: just try focussing on 36mph when there are no markings & 30mph is a dark red line, it takes more than the quick glance I'm willing to give it.

firebobby · 30-10-2012, 23:31

Funny thing is, I have 2 sat nav's and they both read different speeds to each other in the same vehicle

Dynamics · 30-10-2012, 23:41

Quote:

Originally Posted by firebobby

Funny thing is, I have 2 sat nav's and they both read different speeds to each other in the same vehicle

That's because they are competitive little devices... They are probably racing each other...

30-10-2012, 15:44	#1
spiderpig37 Senior Member Join Date: May 2010 Location: doncaster south yorkshire Vehicle: nissan terrano t2+ Posts: 729	speedo readings Does anybody know how far out the speedo reads My reason for asking is i got a speeding ticket in the post today saying i was clocked doing 47 in 40 zone saw the van at the time and thought i was in a 50zone so i would have been doing just under 50 can remember telling the kids to smile for the camera Just suprised its come in at 47mph when i thought the speedos read quite a bit out

30-10-2012, 16:13	#2
arcascomp Senior Member Join Date: Jan 2012 Location: Edinburgh, Scotland Vehicle: 96 Mitsubishi Challenger! Posts: 775	Run a GPS to get a more accurate speed reading, mines about 10% or thereabouts, either that or Inverness has moved further north since the last time I went there! It'll depend on a number of things including how big the outside circumference of your tyres are.

30-10-2012, 16:47	#3
briggie Senior Member Join Date: Mar 2010 Location: peoples democratic republic of west yorkshire Vehicle: " alice " Posts: 10,473	yep , depends whether you have standard tyres or not , but the t2 speedo normally reads high

30-10-2012, 17:55	#4
Terranical Senior Member Join Date: Jun 2010 Location: Resident in Bristol, Terrano in Spain Vehicle: 1994 Terrano 2.7TD SWB Posts: 1,398	Mine reads about 10% fast as well compared with the GPS reading of my Talex - it's on standard wheels & tyres.

30-10-2012, 18:09	#5
supergnome Senior Member Join Date: Sep 2010 Location: Isle of Axholme Vehicle: T2, 2.7 TDI 2002 lwb Posts: 955	36 on clock is 30 on mine, 47 is 40. David.

30-10-2012, 23:31	#7
firebobby Senior Member Join Date: Feb 2012 Location: South Bucks Vehicle: Terrano 3.0 SVE 2005 Posts: 3,499	Funny thing is, I have 2 sat nav's and they both read different speeds to each other in the same vehicle