Citroën
Alternative propulsion includes the following:
Biofuels Biofuel Citroëns include the
Citroën C4 BioFlex (
bioethanol flexible fuel vehicle).
Electric and hybrid vehicles In the earlier years, electric cars were produced, e.g. the AX electrique, Saxo electrique etc. but in smaller series. In the
hybrid electric vehicle strategy there are four concept cars HYmotion at the
Paris Motor Show 2008: Hypnos, illustrating the latest breakthroughs in this field with the hybrid technology HYmotion4; the
C4 HYmotion2 and
C-Cactus (
diesel-electric hybrid), reflecting Citroën's plans to integrate this promising solution in affordable mass-market vehicles; and the
C4 WRC HYmotion4, extending ecological principles to sports cars. Citroën showed the
plug-in hybrid REVOLTe at the 2009 Frankfurt Motorshow. ==Concept cars==