Built in response to a French Government challenge for a car capable of consuming just 1.6 l/100km, the 208 Hybrid Air concept will be substantially different from a regular 208.
Its three-cylinder 1.2 litre engine will be hooked up to a hydraulic pump, which transfers fluid between two reservoirs - one for low-pressure fluid, the other for high-pressure fluid.
Inside the high-pressure reservoir, an air bladder is compressed by the fluid and acts as an energy storage device - but without the cost, weight or complexity of a conventional petrol-electric hybrid's battery.
The pump can also be driven by the vehicle's forward motion while coasting, allowing a form of regenerative braking.
But it doesn't end with the powertrain. The 208 Hybrid Air sheds 100kg through the use of aluminium and plastic composites in its construction, and a lower ride height and tweaked aero helps cut drag.
To reduce wind resistance even further the wing mirrors are replaced with cameras, and mechanical drag is lowered by a special low-viscosity oil for the air storage system.
In the 2008 Hybrid Air, this powertrain was capable of propelling the car for up to 200 metres without using any fuel, with an average fuel economy of just 2.21 l/100km.
With less weight, a more efficient driveline and slipperier aero, the 208 Hybrid Air will likely drink even less.
Don't expect to buy one just yet though, as a petrol-air 208 is reportedly at least three years away from being productionised.
However, the same powertrain is expected to make its debut on the 2008 Hybrid Air, due sometime in 2016.
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