I find the sound (drone and buzz) of 4 cylinder engines annoying. The drone that they produce is particularly unpleasant to me on uphill climbs. 3 cylinder engines, on the other hand, have a wonderful growl that I find less bothersome.
The Motus motorcycle had a V4 engine, as did a number of Yamaha and Honda products. All of which avoid the annoying drone and buzz. Yamaha built a number of inline 4 cylinder engines with an unusual crankshaft, that resulted in a different sound, although I'm not at all sure I'd call it pleasant.
I'd like to see the higher end manufacturers that choose to employ 4 cylinder engines, address the low quality feel that such engines produce.
The Motus motorcycle had a V4 engine, as did a number of Yamaha and Honda products. All of which avoid the annoying drone and buzz. Yamaha built a number of inline 4 cylinder engines with an unusual crankshaft, that resulted in a different sound, although I'm not at all sure I'd call it pleasant.
I'd like to see the higher end manufacturers that choose to employ 4 cylinder engines, address the low quality feel that such engines produce.