Alternative energies

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Alternative energies


CITROËN markets powertrains designed to run on biofuels: biodiesel for HDi diesel engines and bioethanol for petrol engines. Biodiesel and bioethanol help to control global warming by cutting the emissions of CO2 (the main greenhouse gas) from cars. Biofuels limit pollutant emissions since they contain no lead and only a small amount of sulphur. They have high oxygen content so mixing them with conventional fuels improves combustion and thus reduces emissions of particulates, carbon monoxide and other pollutants.


Biodiesel is a blend of diesel fuel and vegetable oil produced from plants such as oilseed rape, sunflower, soy or palm oil. This oil is chemically transformed into VOME (Vegetable Oil Methyl Ester), which is then mixed with diesel fuel. European regulations allow 5% VOME in diesel fuel. Using B30 biodiesel cuts CO2 emissions by 18% and particulate emissions by 22%.


Bioethanol is a blend of petrol and ethanol, an alcohol produced by the fermentation of sugar (beet or sugar cane) or starch produced from cereals (wheat, corn, etc.). CITROËN has developed petrol engines able to use fuel containing up to 10% ethanol (E10 fuel). The use of E10 fuel cuts CO2 well-to-wheel emissions by around 6%.

On some markets, such as Brazil and Sweden, we also sell vehicles using FlexFuel technology, which can run on fuel containing up to 85% ethanol.

CITROËN is aware of the issues relating to food farming and energy farming. It is closely watching studies on second-generation biofuels, which are still at the research stage (use of the whole plant, use of biomass, seaweed etc.). We aim to ensure the compatibility of our engines with these fuels as soon as they reach the industrial production stage, by around 2020-2030.



Available on the C3 and Berlingo First, compressed natural gas is a fossil fuel in abundant supply and of proven efficiency in use (octane rating of between 125 and 130). It is ecological, economical and safe.

Ecological: it cuts CO2 emissions by between 20 and 25% compared with petrol and emits no sulphur oxides or lead. It is already used as a fuel by more than four million vehicles worldwide.

Economical: prices are generally competitive and lower than for petrol or diesel. And a range of tax incentives are available to owners of a CNG vehicle.

Safe: CNG is lighter than air and dissipates rapidly in the event of a leak without forming an explosive layer or inflammable pool. There are no restrictions on access to underground car parks. All CITROËN CNG vehicles are approved and fitted with state-of-the-art safety systems.