The C4 Cactus Airflow 2L is capable of returning more than 141mpg, says Citroën, and weighs just 865kg – 100kg less than the standard Cactus. The car made its public debut at the Paris motor show.
Power for the concept comes from a Hybrid Air powertrain – of the same type used by the Peugeot 2008 Hybrid Air prototype which Autocar drove earlier this summer. A prototype of the technology was shown on a Citroën C3 concept car at the Geneva motor show last year.
The powertrain comprises a 3-cylinder 1.2-litre Puretech 81bhp petrol engine – already available as part of the Cactus range – plus a hydraulic pump and air storage tank mounted at the rear of the car. An epicyclic transmission is also used.
Aside from the obvious economy advantages of using this hybrid setup, Peugeot says it has also reduced frictional losses inside the 1.2-litre Puretech engine thanks to a new internal coating and by using low-viscosity oil.