I just came back from a drive and I’m wondering why my 3.0L I6 engine which has roughly 385HP is relatively quiet besides a low growl compared to my extremely loud lawnmower which as a tiny 6HP single cylinder? Would the muffler of my car make that much of a difference?
In: Engineering
In addition to the muffler and insulation reasons that have been brought up, the engines also work differently.
A lawnmower engine is a 2-stroke while a car is a 4-stroke. A 2-stroke means there’s an explosion in the cylinder every time the piston moves down while it’s every other time in 4-stroke.
So there’s inherently twice as much noise for every revolution in a 2-stroke on a per cylinder basis.
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