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If sound is a concern, and performance, you should go to an RC car off road race some time. Real pro level stuff. Then you can see the fuel burners and electric ones on the same track.
They don't even race them in the same class. The electrics absolutely SLAUGHTER the gas. It's not even a competition. And hearing a brushless electric mod class truck hooking up on dirt on the straightaway is music, man. It's just not as loud. JUST as angry, if not more so.
Everyone had the same complaints/get off my lawn/change is bad when the first higher performance 4 strokes came out. WELL SEE THAT 125 WILL KICK THE SHIT OUT OF THE 125 STROKER, SO THEY HAD TO CHEAT AND GO 250CC, SEE I'M RIGHT