Speedo or GPS?

Skilid · 6 Feb 2011 at 00:51

Which do you trust? I'm driving up north soon and when my speedo says i'm doing 70, my sat nav says 65. Don't wanna get stung by the SPECS near nottingham on the M1.

Which is to be trusted?

Rich_L · 6 Feb 2011 at 00:52

Sat nav

Peerzy · 6 Feb 2011 at 00:57

Sat Nav all day, speedo is allowed to be over by 10% (but not under by anything).

Skilid · 6 Feb 2011 at 00:59

Set the cruise on 75 then when I get to the specs about 54.

Cheers guys.

dannyjo22 · 6 Feb 2011 at 09:38

Why not just go by your speedo, it's under reading and you will be fine. Why bother pushing it the odd mile an hour the GPS will give you to save all of 5 minutes.

Overlag · 6 Feb 2011 at 09:45

my speedo matches my gps perfectly on my FiestaST, 130 is 130. On my Fiesta 1.2 the speedo was well out.... 110mph was about 89 :eek:

Skilid · 6 Feb 2011 at 09:50

dannyjo22 said:
Why not just go by your speedo, it's under reading and you will be fine. Why bother pushing it the odd mile an hour the GPS will give you to save all of 5 minutes.

Because I don't want to annoy lorry drivers and such by going through specs too slowly. And it could save me like 20-25 minutes over this journey.

[TW]Fox · 6 Feb 2011 at 09:56

Overlag said:
my speedo matches my gps perfectly on my FiestaST, 130 is 130.

130mph in a Ford Fiesta :eek:

No wonder they cant trust people enough to increase the motorway speed limit.

daveydave · 6 Feb 2011 at 09:59

Overlag said:
my speedo matches my gps perfectly on my FiestaST, 130 is 130. On my Fiesta 1.2 the speedo was well out.... 110mph was about 89

I doubt that very much, most manufacturers set their speedo's to over read. Ford definitely do, unless you've had it adjusted.

bainbridge · 6 Feb 2011 at 10:10

I took a handheld GPS along a coast walk in south Wales, resetting it just before setting off. When I was looking at the data walking back it said my top speed was 34 kmh!

Colbaker · 6 Feb 2011 at 10:15

Surely it depends on what sort of signal the Sat Nav is getting to how accurate the speed is?

I would just go by my speedo as this is fixed/

burns · 6 Feb 2011 at 10:15

[TW]Fox;18402514 said:
130mph in a Ford Fiesta

No wonder they cant trust people enough to increase the motorway speed limit.

Seems rich from someone who stuffed their BMW in a ditch showing off at a meet.

paddy · 6 Feb 2011 at 10:32

Cripple said:
Which do you trust? I'm driving up north soon and when my speedo says i'm doing 70, my sat nav says 65. Don't wanna get stung by the SPECS near nottingham on the M1.

Which is to be trusted?

I'd set the cruise to 75 the whole way. The roadworks around Nottingham finished months ago

[TW]Fox · 6 Feb 2011 at 10:33

burns said:
Seems rich from someone who stuffed their BMW in a ditch showing off at a meet.

Ah yes of course, becuase if you've ever had an accident you are not allowed to comment on people doing 130mph in Fiestas, I forgot

Burnsy2023 · 6 Feb 2011 at 10:43

Sat Nav is very accurate as long as you are driving in a straight line at a constant altitude.

Skilid · 6 Feb 2011 at 12:43

paddy said:
I'd set the cruise to 75 the whole way. The roadworks around Nottingham finished months ago

They have kept the specs at 50 though. What I heard.

mjt · 6 Feb 2011 at 12:49

[TW]Fox;18402514 said:
130mph in a Ford Fiesta

No wonder they cant trust people enough to increase the motorway speed limit.

What the hell is this supposed to mean?
Clearly the car is safe to drive at this speed, seeing as it's the vmax.

Abyss · 6 Feb 2011 at 12:51

Cripple said:
They have kept the specs at 50 though. What I heard.

The temporary specs cameras are gone. They are however now permanent gantrys with variable speed limit, no idea if these monitor your speed.

Scania · 6 Feb 2011 at 12:52

mjt said:
What the hell is this supposed to mean?
Clearly the car is safe to drive at this speed, seeing as it's the vmax.

In some respects, you could argue you'd be safer in something bigger than a Fiesta, Compare 130 MPH in a Fiesta to a 5 Series for example.

That said, crash @ 130MPH and it'll probably matter little what you were driving....

mjt · 6 Feb 2011 at 12:54

R420LA6X2/4MNA said:
In some respects, you could argue you'd be safer in something bigger than a Fiesta, Compare 130 MPH in a Fiesta to a 5 Series for example.

That said, crash @ 130MPH and it'll probably matter little what you were driving....

That's irrelevant. If the Fiesta was unsafe to drive at those speeds then it would have been limited from the factory and that's a fact.
The brakes and tyres on the ST are not the same as the ones on a 1.2 are they?