Developed in-house, and not shared with any other manufacturers, PSA's new three-cylinder petrol and diesel engines debut on the Peugeot 208, which is an average of 110kg lighter than the 207 it replaces from June. The first 99g/km 1.0 and 104g/km 1.2-litre petrol units will be available from September.

Start/stop will be introduced as an option on the 1.2 starting in early 2013, bringing CO2 emissions down to 95g/km, but will not be offered on the 1.0-litre petrol engine. All of the car's e-HDI diesel units are fitted with start/stop. 

Peugeot said it was also working on a turbocharged three-cylinder unit, with an unconfirmed release date. This could also be used in larger models, similar to downsized petrol engines forthcoming from Ford and Renault.

The 208 will be available in the UK from the end of June, with a UK debut at the Fleet World EV and Low CO2 Fleet Show, being held at Silverstone Circuiton the 18th April. For more information, CLICK HERE.