The Harley-Davidson V-Rod introduced the liquid-cooled Revolution V-twin engine in 2001.
The V-Rod was developed through Harley-Davidson’s collaboration with Porsche, which helped create the 60-degree, double-overhead-camshaft Revolution engine. Its liquid cooling, four valves per cylinder and high-revving character differed sharply from the company’s traditional air-cooled V-twins.
The first V-Rod was the VRSC, sometimes called the V-Rod. It used a 1,131 cc engine and was positioned as a performance-oriented motorcycle rather than a conventional touring or cruiser model. The platform later included several related VRSC versions.
A common mix-up is confusing the V-Rod with the later Street models. The Street 750 used the separate liquid-cooled Revolution X engine, while the original V-Rod family used the Revolution engine.