More left jab than right hook
You could be forgiven for thinking the 2.5-litre atmo boxer four is a carryover, but Subaru says it’s not. It says 90 percent of the engine components have been ‘revised’ with everything from the block, head, crank, conrods, pistons, valvetrain and exhaust, to the engine management, injectors, inlet manifold and spark plugs redesigned. Even the air filter is new. Sounds significant enough, and a power increase of 10kw and efficiency gain of 8.6 percent are worthwhile from an unchanged 2498cc swept capacity.