[MrVito]

Originally Posted by Levi

I do not think the BRZ STI will need a turbo. It will need more power that can be achieved by more expensive technologies, ITB, larger displacement,... and lower weight than can be achieved by more exotic materials, CF roof, trunk, hood, roof, doors,....

Who wants a turbo can get a WRX or WRX STI, or swap the WRX/STI turbo/engine on the BRZ/STI.
I see it rather this way:

BRZ: NA 2.0l, 200 PS, RWD
BRZ STI: NA 2.5l, 250 PS, RWD
WRX: FI 1.6l, 250 PS, AWD
WRX: 2.0l, 300 PS, AWD

You would rather get lesser gains, AND spend MORE money to get less?

We're not discussing whether or not there will be factory turbo option on the FA20, and the whole "if you want a turbo get a wrx", they're completely different kinds of cars, your statement there is lacking logic.

The BRZ STI concept is shown to be powered by a NA 2.0l, where you're getting the 2.5l idea from, I have no idea. Beyond that, we don't know if Subaru will even make the STI variant or not.