In the study three hybrid cars were tested indicatively, which were tested on public city roads
There is a big discrepancy of the companies’ data on plug-in hybrid car emissions from reality. A new study carried out by the University of Graz in Austria on behalf of the European Federation of Transport & Environment, Transport & Environment, reveals a wide discrepancy between the official figures of car manufacturers and their actual performance.
In the study, three hybrid cars were tested for example, which were tested on public city roads. These are a BMW 330e XDrive, a Peugeot 308 and a Renault Megane E-Tech, and all have built-in emissions measurement equipment.
So while the official WLTP lab tests indicate combined cycle CO2 emissions of between 27g/km and 37g/km for the cars in question, real-world tests as a whole recorded emissions between 85g/km and 114g/km when all cars started the trips with a fully charged battery. This in practice means an increase of about three times over the official figures of the companies.
In the city center, which is why they were designed, plug-in hybrids performed better when started with a fully charged battery, but overall emissions were between 1.2 and 1.3 times higher than the figures of companies (WLTP). When the same route was covered with the PHEV’s battery not fully charged, emissions were between five and seven times higher than WLTP standards.
The tests were done, noting also the autonomy of each one from the cars. The BMW 330e had 26% less range than the official figures and the Peugeot 308 47% less. Only Renault responded to the company’s figures, surpassing them by about a kilometer. Of course, under no circumstances should we ignore the conditions under which the tests are carried out by the car manufacturers. These have specific tracks, specific driving style, specific speed, specific road gradients and specific car weight. These clearly do not apply to the movement of a car in city data.
Following these data the report of the European Federation of Transport and Environment, Transport & Environment recommends that plug-in hybrid cars should not be considered as zero-emission vehicles in urban areas.
RES-EMP
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