Paris Motor Show LIVE: Citroen C4 Cactus Airflow Concept image

The French automaker has debuted live during this year’s Paris Motor Show the C4 Cactus Airflow Concept, a prototype that meets the French government’s goal of putting on the streets vehicles with a consumption of just 2 liters for each 100 km.

Obviously, the concept is based on the unusual C4 Cactus model, but has numerous features and technical upgrades – all designed to keep at bay the engine’s desire to eat up the precious fuel.

Aerodynamically, we have in the front a different front bumper that features active intakes – they open to cool the engine and close to improve airflow. At the back we can see a bigger rear spoiler and the 19-inch alloys are also active and equipped with ultra-low rolling resistance tires. All the body modifications bring the aerodynamical efficiency up 20% from the standard version.

The C4 Cactus has also undergone a thorough diet, losing 100 kg (220 lbs). The weight reduction was achieved through extensive usage of lightweight materials, such as aluminum, composites and high-strength steel.

The proprietary Hybrid Air powertrain is under the hood, using a three-cylinder PureTech petrol engine coupled with a compressed air energy storage unit, a hydraulic pump/motor and an automatic gearbox with an epicyclic gear train. There are three modes of operation: air only, petrol engine only and hybrid. The futuristic hybrid powertrain and all the other changes enable the concept to achieve the fabulous average consumption of 2L/100 km (141mpg).