An engine assembly includes an engine block defining a first cylinder bore, a second cylinder bore directly adjacent to the first cylinder bore and a third cylinder bore directly adjacent to the second cylinder bore. The engine block defines a first distance from a diametrical center of the first cylinder bore to a diametrical center of the second cylinder bore and defines a second distance from the diametrical center of the second cylinder bore to a diametrical center of the third cylinder bore. The first distance is different than the second distance.