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Wider tyres fitted, big decrease of maximum speed.
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Coolspot

Posted: Wed Jan 16, 2013 4:19 pm

Joined: Jun 29, 2010
Posts: 244
Trade Rating: +2
Location: East Sussex

The UK law is based on the EU standard, with some minor changes. A speedo must never show less than the actual speed, and must never show more than 110% of actual speed + 6.25mph. So if your true speed is 40mph, your speedo could legally be reading up to 50.25mph but never less than 40mph. Or to put it another way, if your speedo is reading 50mph, you won’t be doing more than 50mph but it’s possible you might actually only be travelling at 40mph.

To ensure that they comply with the law and make sure that their speedometers are never showing less than true speed under any foreseeable circumstances like optional larger wheels as some cars come with bigger wheels than others

I don't see that the rules in Italy would be any different regarding speedos calibrations

Hope this helps


	206 3dr 1.4 GLX modified slightly, Lowered 35mm on full Gmax kit, 17" AEZ xylo alloys 205/45/17, 3.5" Savage back box,

E5GDM

Posted: Wed Jan 16, 2013 7:29 pm

Joined: Feb 07, 2010
Posts: 4455
Trade Rating: +1
Location: Essex

Coolspot wrote:

To ensure that they comply with the law and make sure that their speedometers are never showing less than true speed under any foreseeable circumstances like optional larger wheels as some cars come with bigger wheels than others

To ensure that they comply with the law and make sure that their speedometers are never showing less than true speed under any forseeable circumstances, car manufacturers will normally deliberately calibrate their speedos to read ‘high’ by a certain amount.

kandlbarrett

Posted: Thu Jan 17, 2013 12:13 pm

Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon

I have only ever seen one speedo read slow compared to my SatNav all others are between 5 and 10% fast. I own the car that reads slow and it is a 1984 Alfetta GTV 2000. The speedo is about 5% slow. Ah you have top love these old Italian cars.


	Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm) Why isn't my daughter an Alfaholic?

Coolspot

Posted: Thu Jan 17, 2013 12:51 pm

Joined: Jun 29, 2010
Posts: 244
Trade Rating: +2
Location: East Sussex

The alfetta is probably due to age wear as that means you could get done for speeding while displaying a lower speed an d no manufactur would send there cars from the production line displaying faster.


	206 3dr 1.4 GLX modified slightly, Lowered 35mm on full Gmax kit, 17" AEZ xylo alloys 205/45/17, 3.5" Savage back box,

kandlbarrett

Posted: Thu Jan 17, 2013 4:12 pm

Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon

1984 and Alfa would send ANYTHING off the production line. Nothing has changed there and I love them for it - I get paid loads to keep fixing them.


	Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm) Why isn't my daughter an Alfaholic?

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