Can you expand on your comment that the 2.5L is a strong engine, especially compared to the NA 2.3?
You are not the first one I've heard say that, but I've never really asked what aspect of the 2.5 makes it so much stronger.
They are built quite better, if you look at the internals you can see.
Examples:
The 2.5L has the biggest intake ports of the MZR's. (2.0,2.3,2.3 DISI) and highest flowing head
The pistons are lightened, yet still stout, and are dish.
The connecting rods are forged, and quite similar to the 2.3 DISI engine, they share the same size big end, 90% of their dimensions are the same, except the 2.5L small end of the rod (20mm wrist pin ) and the pins are fully float, not press fit. and they have good rod bolts.
The crank is *controversy* also forged, some models are. but even the PMF cranks can take *at least* 400WHP / 9000 rpm without problems.
The bock itself is similar to any MZR, yet the cylinder walls are not as thin as some would believe.
The 2.5L CRANK SPROCKET design is way better than the 2.3 DISI ( unless they updated it). the sprocket and oil sprocket is a single piece, but the DISI is 2 separate pieces that require 3 torque washers, higher chance of slippage with large power.
the 2.3L N/A is a joke.
Longest connecting rods of all MZR's (2.0/2.3DISI/2.5) and weakest. a touch over 240whp and you might send one flying. That's their biggest downfall
also the stock head isn't as good as the 2.5