Hey guys. Instead of working ive been sitting here wondering why exactly 3 cylinder engines have the awesome sound that they do. Especially what causes them to sound different than a comparitive 180 degree 4 cylinder. If someone could get technical in an explanation that would be great. From what I can figure, it obviously has to do with the firing order of a 120 degree crank. Im thinking it it also deals with how close together in time the combustion strokes occurs. Its almost as if you can hear each combustion stroke occur in a 3 cylinder (at idle speed) where as a 4 cylinder has more of a buzz.