There are different legislative targets set for the next years, e.g. 95 g/km CO2 fleet emission in the EU in 2021. Some links, which might be of interest for you:

http://ec.europa.eu/clima/policies/transport/vehicles/vans/faq_en.htm

http://www.theicct.org/blogs/staff/improving-conversions-between-passenger-vehicle-efficiency-standards

http://ec.europa.eu/clima/policies/transport/vehicles/cars/index_en.htm

http://www.automotiveworld.com/news-releases/5-7-eu-carmakers-track-hit-eu-2021-fuel-efficiency-targets-report/

Kind regards,

Mario

You may try the following link. I found the resource of HBEFA very helpful in air quality studies aimed at traffic induced pollution. However, I am not sure about the data provided on CO2 emissions.

http://www.hbefa.net/Tools/EN/MainSite.asp

Dear Lai,

Europe’s passenger-car efficiency regulation has driven down the official average CO2 emissions and fuel consumption of new passenger cars very well in the EU. The 2015 target of 130 g/km of CO2 was met two years ahead of schedule and officially manufacturers were optimistic about the 2020/21 target of 95 g/km.

But as Ales has alluded, the real emissions on the road are far  higher (38% in 2013, and growing).

Check out these links:

http://www.theicct.org/laboratory-road-2014-update

http://www.theicct.org/real-world-exhaust-emissions-modern-diesel-cars

Dear colleagues,

Thank you so much for your kind attention. Besides CO2 emission, do we any emission factors of other pollutants (i.e. NOx, VOC, CO, BC, OC, etc.) from gasoline and diesel vehicle from developed countries?

Best regards

For sure, e.g. see:

https://en.wikipedia.org/wiki/European_emission_standards

Kind regards,

Mario

Did you check out the link? It gives you emissions in [g/km] for CO, HC, NOx and PM (engine only), CO2 and fuel consumption. You can get the emissions for passenger cars PC, light duty vehicles LDV, heavy duty vehicles HDV, busses UBus+Coach and motorcycles MC. Petrol and diesel driven. Years 2000 to 2030 in 5yr-steps. For traffic mix in Switzerland, Germany, Austria, France, Sweden or Norway

Just check the link > HBEFA > Online Version

If that level of detail is not sufficient, you can get the offline Version and do some more data mining. Have a read of the description and you'll find the background of the data resource.

http://www.hbefa.net/e/index.html

The GHG emissions can vary depending on the fuel type (gasoline, diesel, hydrogen, electricicty...) and from the vehicle efficiency.

Depending on the level of detail you need you can find a huge bibliography.

We, the JRC of the European Commission, together with EUCAR (the EU research body of the car manufacturers) and CONCAWE (the EU research body of oil producers) developed the Well-to-Wheel methodology for such calculations, detailing both the WTT (well to Tank) emissions and TTW efficiency and emissions

You can download all for free at:

http://iet.jrc.ec.europa.eu/about-jec/downloads

Dear colleagues,

Thank you so much for your kind attention. 

Best regards

Actually the emission factor is not constant, it depends upon the type, age, fuel used, vehicle standard norms, etc. So pl. confirm the things.

Go thorough the enclosed link. You may get some idea.

https://www.araiindia.com/pdf/Indian_Emission_Regulation_Booklet.pdf