The combustion process takes place over a much shorter period of time rather than a long burn such as in a gas engine. Since the pressure happens all at once, or as a pressure spike, it sounds like a hammer hitting metal.

Jim B,

You've actually heard some?
'Nice idea.
'Can you hear all the jokesters,"Jim your car is calling you".

I never heard one. But then again, why not?

I actually saw an ad for GUNSHOT ringtones!

I think it came up on an Off topic discussion that was about guns or something.!!

Just amazing. I thought I had heard everything. Clearly, I had not!!

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1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

1995 E 420, 170k "The Red Plum" (sold)

2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp

1967 Mercury Cougar, 49k

2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)