APR showed us last year that the 2.5 TFSI is capable of over 600 all wheel horsepower with their Stage III turbo kit. With stronger internals, who knows what they could possibly hit. Obviously Audi would not deliver over 600 wheel horsepower in a production RS3 or TT-RS (R8 V10 killer) but they agree that there is plenty of room to increase the output of the 2.5 TFSI. To not overlap with the new 2.0 liter four-cylinder's estimated 375 horsepower 400+ will be necessary.
An Audi engineer stated there is plenty of room in the motor, "There will be no overlap because there is a lot of development available to the five-cylinder engine. But we are all very enthusiastic about the four-cylinder. Audi has taken the lead on the development of this engine, because it’s an EA888 engine and that’s an Audi engine. It’s faster and stronger than what we already have, but it won’t replace what we have. It will be in addition to what we have. There is enough space for all three of the engines at the top.”
So the new 2.0 liter four-cylinder motor will be stronger than the current 2.5 TFSI inline-5 but the 2.5 TFSI will be moved upward meaning all three engines will slot into their respective power categories neatly without overlapping. Audi's aggression in power output certainly is interesting to watch and impressive from an enthusiast standpoint. The new RS3 and TT-RS are going to be some very quick cars right off the showroom floor.