The engines available in the forthcoming Peugeot 208 have been announced, with average emissions 34g/km lower than the 207.

All diesel engines fall under 99g/km, a figure matched by a new 1.0-litre, three-cylinder petrol unit, which is one of the greenest petrol engines on sale.

Four of the five diesel configurations will be equipped with the marque’s e-HDi micro hybrid Stop & Start system, which Peugeot say improves efficiency and emissions by up to 15 percent in town driving.

With Stop & Start fitted, the 68bhp 1.4-litre diesel engine will emit 87g/km and return 83.1mpg on the combined cycle. A non Stop & Start-equipped version of the same engine will emit 98g/km and return 74.3mpg – figures matched by 92bhp 1.6-litre models fitted with either a five-speed manual or six-speed automated manual gearbox. A high-output 115bhp 1.6 registers 99g/km and 74.3mpg.

In total five petrol engines will be available, ranging from 1.0 to 1.6-litres. The new 68bhp 1.0 three-cylinder engine is joined by an 82bhp 1.2-litre sister engine emitting 104g/km and capable of 62.8mpg on the combined cycle.

A 95bhp 1.4 will emit 129g/km and return 50.4mpg while a pair of 1.6-litre engines will develop 120 and 156bhp while emitting 134 and 135g/km of CO2. Both models return 48.7mpg.

Peugeot has also confirmed a seven-inch touchscreen will be specified on around 80 percent of models, allowing buyers access to Bluetooth or music files via a USB connection or audio streaming. The supermini will be available in three- and five-door “distinct” bodystyles.

The carmaker had previously confirmed the 208 will be lighter and smaller, while offering occupants more cabin space. The car will go on sale in the summer, with a GTI model following at the end of 2012.