Originally Posted by SWP n Gold
A lot of places are saying a 2.3L 4-cylinder EcoBoost for the 2015 Mustang/Focus RS. If they can make 250+bhp for the Focus ST out of the 2.0, I don't think 300bhp with a 2.3L should be a problem, especially if they change up equipment a little or "tune" it more aggressively. If this is the case, it wouldn't be able to replace the V6 as the base engine because it would end up costing more than a base V6 ($23K right now). It would most likely slot between the base V6 and base GT at maybe the $26-27K mark (total estimation obviously).
More money, less performance, and maybe a couple more mpg? This would be an odd decision on Ford's part IMO. They've done something similar recently (F150) so there's precedent, but I'd be surprised nonetheless. It's tough to find a good argument for changing either the V6 or the GT formula.