Volkswagen has added a new 1.5-litre TSI ACT engine to the Golf range, which promises fuel consumption of 58mpg.
The petrol engine will be cheaper than an equivalent diesel and has CO2 emissions from 110g/km.
It has an output of 130PS and will also be available for other Volkswagen models in the future.
The efficiency is achieved through a new TSI Miller combustion process and the use of a high-tech turbocharger with variable turbine geometry.
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