Ford has revealed its 2011 WRC challenger ahead of its debut at the Rally of Sweden in mid- February.First seen at the Paris auto show late in 2010, the full competition-liveried Fiesta WRC car was unveiled by Mikko Hirvonen at the Autosport International Racing Car Show in Birmingham, England.It conforms to the new set of 2011 WRC regulations with a 1.6-litre turbocharged engine, downsized from the Focus two-litre, in-line, four. Although outputs remain unconfirmed, 220kW and 350Nm are expected from the smaller engines for this season.Other changes for the 2011 car include a return to manual sequential shifting (instead of steering-wheel paddles) and non-active differentials. The cars are shorter, trimmed from four metres in length to 3.8. Ford has promised to release full technical details of its new Fiesta rally car just before the 2011 WRC season starts. Its chief competition – as usual – will be in the form of the most successful rally driver of all time, Sebastien Loeb, and his new weapon – Citroën’s DS3.