True. And I see your point. But, we aren't talking N/A anymore. It's much easier to get power out of a boosted engine then it is a N/A engine. And if the claim are that Honda is going to go through with boosting the Si from the factory then they are not going to give it the same displacement as the Type-R and put a turbo on it as well because that will put it's power output too close to the Type-R. At that point it's like "well why are we building a Type-R if the Si is going to be practically the same?" The answer is simple. They will not. The Si and Type-R are on two completely different playing fields stock for stock. They always have been and always will. SI stands for (Sports Injected) which means they are making the civic A LITTLE sporty. The Type-R means Type-Race which means it is a race ready built car and has the characteristics of a racing car. Now I get your point about them being somewhat similar in the past. But this is the present where tech is advancing more quickly than ever before and with today's new technology that is available and with different types of consumers becoming more segregated. There is no way the Si is getting a boosted 2.0L it will get a 1.5L. Even a 1.8L turbo would be pushing it. The reason I say the 1.5 is because on that link that was provided the power output was almost the same as our current K24z7 but even MORE torque around 30ft-lbs more. Which is what the people have been wanting is more torque. Turbos are the new replacement for displacement. NOW! This is not saying that the two engines won't be in the same family and won't be able to do a bottom end swap or even bore it out to a 2.0L and do a head swap like people have been doing with all Honda engines since forever. Or the Type-R could have it's very own line of engine like the NSX did with it's C series engine. Only time will tell. But my money is on the 1.5L turbo Si to compete with the sporty eco boxes starting to run around. Like the Dodge Dart and and the Focus st. Not to mention the smaller engine will hopefully mean weight savings as well.Clearly some people take their Honda engines seriously. I will defer the detailed differences to those who know as I'm out of my league there. My point is that the typeR and GSR both used a 1.8L. Whatever design differences there are I don't know, but it's not as if the Type R used a significantly bigger or more powerful engine than its Si or GSR counterpart. That leads me to believe the Si will also be some 2L turbo variant, not the 1.5L turbo, as that is too big of a difference.
Edit* also I mentioned the focus St even though it would have more power than the 1.5L Si that could easily be changed with some aftermarket bolt ons like intake, exhaust, bigger injectors a tune and could easily be pushing around 250hp I bet
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