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Where do we find the data necessary to calculate the Ecoscore?

Data collection

The data needed to calculate the Ecoscore are originating from different sources. We distinguish between direct and indirect emissions, as well as between recent and old vehicles.

Recent vehicles:

  • Direct emissions


    These are emissions related to the use phase of the vehicle, or in other words those pollutants emitted while driving. A share of these emissions depend on engine technology, another part on the fuel type and fuel consumption, and a third part is measured during the official approval tests a vehicle has to undergo before it can enter the European market. The first two groups of data originate from European studies or can be derived from the composition of the fuel used. The last group of data, i.e. those related to the homologation procedures, is received from the Dutch 'Rijksdienst voor Wegverkeer' (RDW). Since quite some years, RDW collects emission data of all vehicle models available in Europe. The FPS Mobility, 'Dienst Inschrijving Voertuigen' (DIV) provides VITO with the new registration data on a regular basis. Afterwards, this data set is completed with emission data by RDW.

    Since March 2014, we do not only include new vehicle registrations from DIV in the set of "new models"., because from that moment, we call on EurotaxGlass's (an automotive data provider) to extend our database with the newest car models available. These are models that are already in the catalogues but have not yet been registered at DIV. For the latter group of cars, only an approximate Ecoscore can be calculated (based on Euro standard, fuel type and CO2 emissions) as detailed emission data are lacking. In our approach, we assume that the limit values of the relevant Euro standard apply for such emissions , and as such the Ecoscore calculated constitutes a lower bound of the actual score. Obviously, an actual Ecoscore is calculated once this vehicle is registered at DIV for the first time. As we update our database each 2 months and because of this extension of the database, it rarely happens that a new car model for sale in Belgium is not present on our website (this can only happen when that model comes for sale since the last update, cfr. the first date shown at the bottom of this page).

  • Indirect emissions

    These are emissions associated with the production and distribution of the fuel the vehicle consumes. Surely, the level of indirect emissions depend on the fuel type and fuel consumption of a vehicle: the more a vehicle consumes, the more fuel will need to be produced and the greater the emission of pollutants will be.

Old vehicles:
From all vehicles dating from before 1/1/2002, few emission data from the approval tests are available. Therefore, we opted to work with assumptions regarding approved emissions for such vehicles. For all vehicles dating from before 01/01/1998, this is even true for fuel consumption as well. For these vehicles, we therefore use additional assumptions regarding fuel consumption and related CO2 emissions.

Where can I find the data necessary to calculate the Ecoscore for my own car?

You should have a look at your certificate of conformacy (CoC) of your car. For the majority of the cars built since 2002, you can find all direct emissions there, which can be used to calculate the Ecoscore yourself by using the calculator tool. Please be careful here because, depending on the car make, the emission units used on the CoC can differ from the units needed in the calculator.

How can I calculate an (approximate) Ecoscore for a new car model that I do not find in your database yet?

Even when you wish to calculate a score for a car that you do not find yet in our lists, you can use the calculator tool. Fill in the fuel type, euro standard and CO2 emissions, and use the hyperlinks on the right to complete the other input fields. The resulting Ecoscore is then lower than the exact/actual value, but it provides a first idea of what Ecoscore that particular car may attain at least.

last database update: 12/05/2022 - next database update planned for: 15/07/2022
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