Actually the engine specs of the STI have come out...
And they're staggering.
The Subaru BRZ STI Engine Debuts in Japanese version of the Legacy and Next Generation WRX
Our insiders have been telling us all along that the Subaru BRZ 2.0-liter flat four boxster engine would be receiving a turbo. Subaru and Toyota have been vehemently denying the rumor during the initial launch of the “Tokyo Triplets” who would be the Subaru BRZ, Scion FRS and Toyota GT-86 models. Yesterday we saw the first official confirmation from Subaru that what we have been reporting all along has the possibility of coming true in the year 2014.
It was announced yesterday that a turbocharged version of the BRZ’s engine will be used in the Japanese market to power the refreshed Subaru Legacy and will find its way in to the next generation Subaru WRX. The turbo FA20 engine has been reported to be output just under 300 hp and will tip the scales at a very impressive and capable 296 hp and 295 lb-ft of torque. These stats are staggering as our insiders were previously suggesting that the Turbo BRZ STI would be tuned to 270 hp. Either or the current engine in the BRZ is capable of outputting a clean and even 200 hp and 151 lb-ft of torque.
The new turbo FA features Subaru’s own direct-injection setup, as opposed (boxer-engine pun intended) to the BRZ’s Toyota-derived direct- and port-injection heads. We think the 2013 BRZ is an extremely capable car and with its 200 hp powering the rear wheels, it is incredible well balanced and predicable. A version of the car that has an increase in power of 33% sounds like pure lunacy and we can’t wait to drive it.Stay tuned to Car Rolodex for Toyota’s TRD division when the step up to the microphone and announce that they will in fact be bolting a supercharger on to the same engine and equipping the FRS and GT-86 with it.