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How to calculate an Ecoscore when some data are missing?

We need quite a lot of data if we want to calculate an Ecoscore (see info page on data collection). For older vehicles, air pollutant emissions (CO, HC, NOx and PM), noise and/or CO2 emissions are often missing. The method described below only applies to cars and vans.

When emission data for air pollutants are lacking, we complete these gaps by using the values from the table below (expressed in g/km; these values only apply to cars). Starting from Euro 1, they perfectly correspond with the Euro emission standards (see European measures). Beware, we maken an exception for NOx in the case of diesel cars. More info: http://www.ecoscore.be/en/info/ecoscore/nox.

Euro standard From Petrol Diesel
CO HC HC+NOx NOx PM CO HC HC+NOx NOx PM
Euro 0 <1/7/1992 2,72 0,534 0,97 0,437 0 2,72 0,097 0,97 0,873 0,14
Euro 1 1/7/1992 2,72 0,534 0,97 0,437 0 2,72 0,097 0,97 0,873 0,14
Euro 2 1/7/1996 2,2 0,275 0,5 0,225 0 1 0,07 0,7 0,63 0,08
Euro 3 1/1/2000
1/1/2001
2,3 0,2 0,35 0,15 0 0,64 0,06 0,56 0,50 0,05
Euro 4 1/1/2005
1/1/2006
1,0 0,1 0,18 0,08 0 0,5 0,05 0,3 0,25 0,025
Euro 5 1/9/2009
1/1/2011
1,0 0,1 0,16 0,06 0,005 0,5 0,05 0,23 0,18 0,005
Euro 6 1/9/2014
1/9/2015
1,0 0,1 0,16 0,06 0,005 0,5 0,09 0,17 0,08 0,005

The first date applies to new vehicle models, the second date applies to all new vehicles. 

If the noise emissions are missing, we assume a default value of 74 dB (A) for all vehicles with a conventional internal combustion engine or normal hybrid (no plug-in) drive. We assume that plug-in hybrids and fully electric vehicles are generally quieter, and therefore we assume a default value of 68 dB (A) for these types of vehicles.

When emissions of CO2 are lacking, we use default values from the table below (expressed in g/km). This table was arranged based on average emissions of a representative set of vehicles.

Fuel type Cylinder capacity Euro standard
6 5 4 3 2 1 0
CO2 emissions expressed in g/km
Petrol & LPG 0 to 1399cc 117 125 140 150 164 173 175
1400cc to 2000cc 150 159 172 185 200 211 213
higher than 2000cc 228 238 247 259 279 295 297
Diesel 0 to 1399cc 98 103 120 116 125 132 133
1400cc to 2000cc 117 125 144 151 163 173 174
higher than 2000cc 159 169 201 199 214 226 228
CNG 0 to 1399cc 94 100 112 120 131 139 140
1400cc to 2000cc 120 127 138 148 160 169 171
higher than 2000cc 182 190 198 207 223 236 238
last database update: 12/05/2022 - next database update planned for: 15/07/2022
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