Following the footsteps of Ford, Citroen has recently introduced its new PureTech family of three-cylinder petrol engine with capacity of 1.0-litres and 1.2-litres. Unlike Ford's EcoBoost, Citroen's power plants are naturally-aspirated and hence they produce a more modest output ranging from 68bhp to 82bhp.

These new range of engines will be fitted on the C3, DS3 and C-Elysée. The PureTech engines offer equivalent or better power compared with the previous generation of power plants while returning far lower fuel consumption and emissions at the same time.

Several factors have contributed to the PureTech's tree-hugging attributes. The use of fewer moving parts results in lesser frictional loss and lower weight. The usage of lightweight alloy material for the cylinder heads and casing contribute further to the slimming process. The bore/stroke ratio optimises the compromise between the intrinsic efficiency of the combustion system and engine friction loss.

Some 52 patents were filed in the development of the new engine family. The engines will be produced at the Trémery site in France.

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