6. Citroën DS4 Racing Concept
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| Photo: Citroën |
Engineers at Citroën Racing lowered the chassis and widened the track on its production DS4. The concept also sports an air diffuser, front bumper panel, lower-body belt-line and wing extensions. A tweaked 1.6-litre turbo engine now develops 256 bhp, or 160 bhp per litre, a record for a series-production car. More details on the Citroën DS4 Racing Concept.