Third generation Ford Focus RS is rumored to arrive end of 2013 with a new 2.3-litre EcoBoost turbocharged engine producing up to 330bhp. The second-generation Focus RS uses a 301bhp 2.5-litre five-cylinder turbo RS, so the new model would have 32bhp more, which is not a whole lot.
In an interview to AutoExpress, Matthia Ton, the chief program engineer for global performance cars at Ford, stated the turbo 2.0-litre in the new Focus ST is too close to its power limit and to get more out of the engine would require substantial revision of the turbo and fuel systems. In case a new Focus RS comes it would use the Ecoboost 2.3-litre unit.
The 2.3-litre EcoBoost engine is currently under development in North America and will very likely replace the V6 units in entry-level Ford Mustangs.
The new Focus RS has not yet been officially confirmed, but it will be sportier and more track oriented than the new 247bhp Focus ST. Updates over the Focus ST will most likely include a rear wing, revised bumpers, new wheels, sportier seats, a mechanical limited slip differential, bigger brakes and stiffer suspension.