Built as a successor to the Citroën Xsara WRC, the Citroën C4 WRC was revealed on 2006 Paris Motor Show as Citroën's machine for the 2007 World Rally Championship season. Based on the Citroën C4 Sport Concept, the construction of the C4 WRC was carried out by Citroen Sport's engineers at Versailles Satory. Although most of the styling on the concept were retained, however it had undergone necessary modifications to meet the satisfaction of international regulations and performance requirements. The glass roof from the C4 Concept were replaced as it is banned from rally racing, and its bodywork was tested in a wind tunnel on a 1/4 scale model before being made into a full size version for cost efficiency. Like the Xsara WRC, it features a 2-litre turbocharged engine mated to a cross-mounted 6-speed gearbox. At 4.20 m, the C4 WRC is longer than the Xsara and, in line with regulations, therefore has a larger width of 1,800 mm, compared with 1,700 mm for the Xsara.
Since its debut, the C4 WRC is proven to be one of the most successful rally car to date. Nine-times WRC champion, Sébastien Loeb won four of his driver championships with it from 2007 to 2010. It also won Citroën team the manufacturer's title from 2008 to 2010. Throughout its career, the C4 has won all of the 13 pure tarmac rally stages in WRC.
“A dominant force in rallying since it's beginning, the Citroën C4 World Rally Car is at home on any surface. With its quick and nimble chassis, this is one of the finest rally cars of the modern era.” — Car Viewer description
The Citroën C4 WRC is a Pro-class Rally car in DiRT 3.