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 a handy means of comparing the power-generating capability of all engines regardless of size. Below, a chart of the current specific-output champs in both the naturally aspirated and forced-induction realms.