Paris, France - the Citroën C4 Cactus Airflow two-litre concept, scheduled to premiere at the Paris motor show in a couple of weeks, does not, as you might expect from its name, have a two-litre engine.
It's a lightweight hybrid, using petrol and compressed air as power sources, and it's a runner; it gets its name from the maker's claim that it will complete the EU revised cycle on less than two litres of petrol per 100km.
To do that it is 100kg lighter than the production Citroën C4 Cactus, itself 200kg lighter than the C4 hatchback on which it's based, thanks to an aluminium upper cowl panel, inner side members and rear floor pan, high-strength steel front side rails and heel board, and composite floor-panels.
Carbon-fibre is used for the suspension springs, tailgate, rear bench, side panels, roof, roof cross-members, wings and doors, as well as the lower side sill, wheel arches and the lower part of the front bumper, its characteristic woven texture providing an attractive contrast with the pearlescent finish of the painted sections.
The bonnet and engine cradle are aluminium, the panoramic sunroof is made of translucent polycarbonate and even the Cactus' signature Airbump panels are made of carbon fibre.