According to the AA website, emissions limits that apply to ULEZ are as follows, with values reported on on the Certificato di Confirmita CEE which I have for my 20vt Plus shown in bold afterwards
Euro 4 emission limits (petrol) CO – 1.0 g/km 1.337 HC – 0.10 g/km not given NOx – 0.08 g/km not given PM – no limit not given
So it fails on CO, but before you get your hopes up on NOx, the total HC+NOx is given as 0.383 vs. the limit of 0.18
The Fiat Coupe is only Euro 2 compliant at best
1996 Portofino 20vt & 2000 Pearl White Plus 2008 Ferrari F430 & 2017 Fiat 124 Spider
Re: ulez for 20v VIS
[Re: DaveG]
#1662266 05/12/202218:5405/12/202218:54
Limit is 0.08 The fiat coupe vt6 must be near that limit I have to wait up to 3 months as I asked fiat for a certificate of Conformity
Unfortunately the CoC will not give you that breakdown between NOx and HC figures. The requirement to do so only came in on the Euro 3 standard. Euro 1 and 2 lumped the HC and NOx in together, Coupes being Euro 2 vehicles I doubt you will ever find the info short of getting it tested yourself (which no doubt they would accept even if it met the standard!!)
According to the AA website, emissions limits that apply to ULEZ are as follows, with values reported on on the Certificato di Confirmita CEE which I have for my 20vt Plus shown in bold afterwards
Euro 4 emission limits (petrol) CO – 1.0 g/km 1.337 HC – 0.10 g/km not given NOx – 0.08 g/km not given PM – no limit not given
So it fails on CO, but before you get your hopes up on NOx, the total HC+NOx is given as 0.383 vs. the limit of 0.18
The Fiat Coupe is only Euro 2 compliant at best
--- Here are emissions from the fiat Manual but CO is given as a percentage and the HC is p.p.p.m .. can these figures be converted
Unfortunately those figures cannot be converted to g/km without filling in certain unknown assumptions.
The ppm figures in the handbook refer to the concentrations of CO and CO2 present in exhaust gas -- to know the the actual amount in grammes produced in one kilometer, you would need to know the volume of exhaust gas produced per kilometer of driving.
Of course we all know the latter very much depends on driving style/terrain!
It seems the way this is assessed for the Euro emissions measurements is on a dyno, with a rather specific simulated driving schedule (the New European Driving Cycle).
Without actually doing that measurement, all we can do is plug in a guess as to the exhaust gas volume per kilometer for a VIS under those conditions which -- in turn -- makes whatever answer you might get far from definitive.
I got this info from Chatgtp with regards the conversion for CO% HC ppm says the 20V VIS is within Euro4 standard need a conclusive answer on the NOx value asking Fiat heritage and fiat club Italy.
My VIS used to give in excess of 40 mpg especially with the radio turned up to drown the sweet sound of the exhaust
The VIS was way ahead of the time the fiat coupe hand book page 95 also says "“ Environmental protection has been one of the guiding principles in the production of the Coupé Fiat. It is no accident that its pollution control equipment's i much more effective than that required by current legislation.....
Hi the European Emissions Standards info from wikipedia no mention of CO2 just which is printed in the workshop Manual as < 0.35 so which is within euro 4 standard
I have spoken to Fiat and Fiat Heritage via email, told me that the" relevant department" has no information on Euro 4 NOx.
Further more we now know from the Workshop Manual CO and HC ppm are within the Euro 4 Standard. The Fiat Coupe 1998 work Workshop Manual mentions NOx.
"The three-way catalytic converter, makes it possible to simultaneously keep down the levels of the three pollutant gases in the exhaust gases: unburnt hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx).Two types of chemical reaction take place inside the converter: oxidation of the CO and the HC, converted into carbon dioxide (CO2) and water (H20);reduction of the NOx, converted into Nitrogen (N2)."
If the Fiat Manual is saying NOx is "reduced" Fiat I assume measured NOx at the time the car was tested .
Does any member / club official have any contacts with Fiat that can find out what the NOx value was in 2000 ? or old Fiat Documents that mention NOx value ? anything whatsoever
I am hoping it is within the Euro 4 limit of 0.8 NOx but if it is above the limit I have a definite answer and can put this quest to bed.