The car is an evolution of the 2008 Hybrid Air prototype which Autocar drove earlier this year, and is Peugeot's answer to a challenge set by the French government to put a car into production by 2020 which is capable of returning 141mpg.
The concept is based on the 1.2-litre PureTech 82 208. In standard form, that model is capable of returning 62.7mpg and emits CO2 emissions of 104g/km.
Peugeot's engineers have reduced the 208's kerb weight from 960kg to 860kg, mainly by replacing part of the standard car's steel construction with composites and aluminium.
A new composite floor pan is fitted, while some elements – such as the tailgate – have been redesigned to incorporate new materials. Carbon composites are also used for much of the 208's bodywork.
The standard car's 1.2-litre Puretech 82 petrol engine and five-speed manual transmission have been replaced by a hybrid drivetrain based on a mixture of petrol and compressed air. In the 2008 prototype, the system was able to produce fuel economy of 106mpg with estimated CO2 emissions of just 50g/km.