Focus RS was launched in 2009. Contrary to numerous rumours and speculation the RS was announced by Ford to have a conventional FWD layout with an upgraded Duratec ST engine with 305PS Duratec RS, gearbox, suspension, and LSD.

 

The RS uses a modified Volvo-engineered 2,522cc five-cylinder engine found in the Focus ST. A larger Borg Warner K16 turbo now delivers up to 20.3-psi of boost, exactly double that of the 225-hp ST's engine. A new air-to-air intercooler has been developed as a complement, while the forged crankshaft, silicon-aluminum pistons, graphite-coated cylinder bores, 8.5:1 compression ratio and variable valve timing also up the power output. The car remains front wheel drive, but to reduce torque steer uses a Quaife Automatic Torque Biasing LSD, and a specially designed MacPherson strut suspension at the front called RevoKnuckle, which provides a lower scrub radius and kingpin offset than traditional designs while avoiding the increased weight and complexity of double wishbone and multi-link suspension setups.

​

Focus RS was available in three expressive exterior colours: Ultimate Green, Performance Blue and Frozen White.