Can't read the kph on my Sportage

I have had a Kia Sportage KX3 just under two months and really enjoy the vehicle - fuel consumption is between 36/40mpg with 2000 miles on the clock. I have just noticed that in day light it is impossible...

Speedo and satnav show different speeds - which is more accurate?

My Garmin nüvi 1300T satnav consistently shows 4mph less than the speedometer reading on my Qashqai 1.6 Acenta manual, checked on a level road. For example, at 30mph on the speedo the satnav reads 26mph....

Should I trust my Mondeo's trip counters or my own calculations when measuring mpg?

I have owned two cars from new with trip computers, both of which were over-optimistic about fuel consumption. Typically in my 2008 Mondeo diesel I achieve 47mpg by doing brim-to-brim calculations. The...

Which is more accurate - my satnav or my speedometer?

As my car's indicated speed differs by over 3mph on its speedo from what is shown on my satnav (which means there is at least a 10 per cent difference at 30mph), do you know which is more accurate? Also,...

What law says speedos are not to under-read?

Is there a law which says speedos are not to under-read?

Is my satnav more accurate at reading speed than my speedometer?

I notice in most cars a satnav always seems to indicate a vehicle speed 2 or 3 mph less than the car speedo. I assume that the satnav should be absolutely accurate, but would appreciate your comments.

Why has my Ford Focus' speedometer has developed an intermittent fault?

I have a Ford Focus estate with a 1.8 Zetec engine, registered in 2001. It has now travelled about 75,000 miles with no problems. Recently a fault has developed: the speedo and milometer stopped working...

Are the speedometer and odometer in my Toyota Prius over-reading?

I've just bought a new 61-plate Toyota Prius which has a completely electronic dashboard display. Checking the speedo against a SatNav, it showed that at a constant 70mph indicated (held by cruise control...

Ford Focus speedo problem

I have a 2000 Ford Focus 1.8. When the engine has warmed up the speedo stops working for 5-20 miles, while the speedo isn't working the odometer and radio don't work properly and the engine loses power. Also,...

Speedo accuracy Vs GPS

With all the technical wizardry in modern cars, why do speedometers routinely over read? I've used GPS/Satnav units in many different cars and the cars speedo is always over reading. Spookily this over...