Not only do TVR exaggerate their BHP claims but...
Discussion
....having bought a Road Angel for use in my 96 Griff, it seems that according to the RA's GPS speedo my car's speedo over-reads by a whopping 16% 
When used in my company Vectra the RA only has a difference of 4mph throughout the range which I would have thought was more acceptable.
Always thought the Tiv's speedo was a little optimistic but also thought the noise, handling,etc helped towards the impression of speed.
Sixteen bloody percent!
Still that might mean that the car has done slightly less miles than I thought it had when I bought it 2 years ago
Anyone else checked theirs against GPS?
When used in my company Vectra the RA only has a difference of 4mph throughout the range which I would have thought was more acceptable.
Always thought the Tiv's speedo was a little optimistic but also thought the noise, handling,etc helped towards the impression of speed.
Sixteen bloody percent!
Still that might mean that the car has done slightly less miles than I thought it had when I bought it 2 years ago
Anyone else checked theirs against GPS?
Speedo correct to within ~1mph! Happy! neilmac said:
....having bought a Road Angel for use in my 96 Griff, it seems that according to the RA's GPS speedo my car's speedo over-reads by a whopping 16%
When used in my company Vectra the RA only has a difference of 4mph throughout the range which I would have thought was more acceptable.
Always thought the Tiv's speedo was a little optimistic but also thought the noise, handling,etc helped towards the impression of speed.
Sixteen bloody percent!
Still that might mean that the car has done slightly less miles than I thought it had when I bought it 2 years ago
Anyone else checked theirs against GPS?
Our 500 is around 5-6 mph over at 130ish. Have you all standard wheels / tyres ?
Regards, Ed
Through the lights indicated speed 157mph true speed 158mph no problem.
as regards HP well on a rolling road dyno after a bit of work and a lot of money 365 HP at the back wheels, and it feels like it. To be quite honest its not the smoothest engine now and I wonder if the effort has been worth it ,oh and by the way the car is a 97 500 Griff in the handbook it states 340hp, before i did the various mods over two years it showed an 320 HP output it was a very warm day when it was first tested.
To be quite honest the extra 50 hp is not really worth the effort, buy a Tuscan S
regards Simon
as regards HP well on a rolling road dyno after a bit of work and a lot of money 365 HP at the back wheels, and it feels like it. To be quite honest its not the smoothest engine now and I wonder if the effort has been worth it ,oh and by the way the car is a 97 500 Griff in the handbook it states 340hp, before i did the various mods over two years it showed an 320 HP output it was a very warm day when it was first tested.
To be quite honest the extra 50 hp is not really worth the effort, buy a Tuscan S
regards Simon
Oh dear. Not sure if I can really be bothered here but you will always find a difference in bhp claimed/found - but what is actually at the flywheel.
For info, manufactures shouldprovide speed indicating device within +10%/-0% (that is legal req't) but TVR seem to flaunt this. At present my own speedo reads 70mph when it's actually 90mph and I have the points to prove it!
But don't get hung up over it - just get it fixed. I hope to get mine done soon or it will be another 3 points!
For info, manufactures shouldprovide speed indicating device within +10%/-0% (that is legal req't) but TVR seem to flaunt this. At present my own speedo reads 70mph when it's actually 90mph and I have the points to prove it!
But don't get hung up over it - just get it fixed. I hope to get mine done soon or it will be another 3 points!
neilmac said:
....having bought a Road Angel for use in my 96 Griff, it seems that according to the RA's GPS speedo my car's speedo over-reads by a whopping 16%
When used in my company Vectra the RA only has a difference of 4mph throughout the range which I would have thought was more acceptable.
Always thought the Tiv's speedo was a little optimistic but also thought the noise, handling,etc helped towards the impression of speed.
Sixteen bloody percent!
Still that might mean that the car has done slightly less miles than I thought it had when I bought it 2 years ago
Anyone else checked theirs against GPS?
Hi Neil - why aren`t you working then?
It`s a TVR safety measure so you are less likely to speed
Edt said:
Our 500 is around 5-6 mph over at 130ish. Have you all standard wheels / tyres ?
Regards, Ed
Standard wheels and 245/45ZR-16 SO2s, so they shouldn't cause a problem, history on car is good and verified so I doubt clocking has anything to do with it and because of that I don't think its had a speedo change either which may cause a mismatch with the speed sensor.
Seems there is quite a variation between others speedos ranging from good to bad and mine (v.bad) - just one of those TVR things then
Neil
>> Edited by neilmac on Friday 26th March 09:40
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