Harley Davidson and Royal Enfield are two different motorcycle manufacturers that offer various different models of motorcycles.Harley Davidson and Royal Enfield are two of the most prominent motorcycle companies around the world. Both the companies have been butting heads to gain loyal followers. While, Royal Enfield is the dream for all bike lovers in India, Harley Davidson has gained numerous followers worldwide.Harley Davidson is an American motorcycle manufacturer founded more than 100 years ago in 1903 by William S. Harley and his friend Arthur Davidson. The two friends drew up plans for a small engine with a displacement of 7.07 cubic inches (116 cc) and four-inch (102 mm) flywheels. When done, they found that the engine did not fulfill the purpose they were looking for and started working on better models with higher displacements.