Below is an article from Car and Driver exploring the 2012 10Best: Highest-Specific-Output Engines where the Evo ranks number 3.
Specific output is an index quantifying the amount of power produced per unit of piston displacement. (Piston displacement being, of course, a precise measure of an engine's internal size.) Large engines are capable of generating huge amounts of power, but a tougher challenge is producing ample power from a small engine. Specific output provides?