Citroen C4 Cactus Airflow 2L Concept Side Wind Tunnel carwitter 700x432 - Citroen reveal 141 MPG Cactus - Citroen reveal 141 MPG Cactus

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Citroen reveal 141 MPG Cactus

18 Sep , 2014  

Citroen C4 Cactus Airflow 2L Concept - Front - carwitter

You are probably already aware of our love for the Citroen C4 Cactus.

Well now Citroen have revisited the already slippery crossover. By optimising the Cactus design the bods at Citroen have managed to improve the aerodynamics by an extra 20%.

They also added tall and narrow tyres with lower rolling resistance, the improvements did not stop there though. Lighter parts have also been added to cut weight by 100 KG!

Citroen C4 Cactus Airflow 2L Concept - Side Wind Tunnel - carwitter

Bodywork changes include:

  • The new front bumper features three air intakes that continuously adjust in accordance with vehicle use, both for engine cooling and to regulate air flow
  • Mobile side deflectors have been added to effectively guide the air flow around the vehicle
  • The wheels feature mobile shutters activated and controlled by centrifugal force
  • New generation 19-inch “ultra ultra” low rolling resistance “tall & narrow” tyres. Their design improves both energy efficiency and aerodynamics. The large diameter also means they are better able to soak up bumps and dips in the road surface
  • The wheel arches feature an “Air Curtain”. This is achieved with small aerodynamic slats on either end of the front bumper to channel the air along the wheels
  • The spoiler has been lengthened and an air extractor has been added on the rear bumper in order to reduce the turbulence that can increase drag
  • The conventional door mirrors have been replaced by smaller, slimmer rearview cameras to reduce the impact on air flow
  • The vehicle sub-structure has been entirely streamlined so the air flows smoothly underneath the car
  • LED light modules at the front and rear replace the existing lights. Consuming little power, these new modules save energy and benefit fuel economy

Citroen C4 Cactus Airflow 2L Concept - Chassis - carwitter

The C4 Cactus Airflow 2L concept has three driving modes:


  • Air power (zero emissions) where the compressed air motor takes over from the petrol engine
  • Petrol power, using only the combustion engine
  • Combined power, drawing upon both the combustion engine and the compressed air

The two compressed air storage tanks are made of composite materials and are positioned at the rear of the vehicle.

All these advanced technologies together deliver consumption of 2l/100 km. It could therefore be possible, in the medium term, for a production vehicle such as C4 Cactus to reach this target.

Citroen C4 Cactus Airflow 2L Concept - Rear - carwitter


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Owner / Editor of Carwitter - French car fiend, hot hatch lover. Freelance writer and car journalist I've turned my passion for cars into my livelihood.