Harley had found a direction, but it needed help turning an ambitious engineering project into a polished production engine. A Harley-Davidson VR1000's V-twin engine on display Wikimedia CommonsHarley still played the central role in determining what the new engine needed to be. The Harley-Davidson Revolution Engine Was Years Ahead Of Its TimeBring a TrailerThat engine was the Revolution V-twin, introduced in the 2002 Harley-Davidson VRSCA V-Rod. Why Harley Abandoned The Engine Before Its Ideas Became EssentialStock photo of the Harley-Davidson Night Rod Porsche Engine Harley-DavidsonThe Revolution evolved during the V-Rod’s long production run. That’s the strange legacy of the Revolution engine.