Why is the stock exhaust on a diesel pickup truck louder than on a gasoline powered one?

It seems that a stock gasoline exhaust system is quieter than the stock diesel exhaust system on pickup trucks. For example, the exhaust on a Ford pickup truck with the 5.4 Triton gasoline engine doesn’t seem to be as loud as one with the 7.3 Powerstroke diesel engine. I’m not talking about the clatter from the diesel engine, I’m saying the sound from the exhaust pipe itself seems to be louder. If I’m not mistaken, and the exhaust system is louder, what causes it to be that way? Is there more exhaust pressure from the diesel?

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4 Responses to Why is the stock exhaust on a diesel pickup truck louder than on a gasoline powered one?

  1. D June 18, 2011 at 2:35 am #

    Diesel engines are just louder, they have much more exhaust blast from the turbo, and there is no throttle to restrict airflow through the engine like a gas powered vehicle has.

  2. Bill M June 18, 2011 at 2:35 am #

    Probably because the diesel has higher compression and doesn’t have a throttle.

  3. talon0325 June 18, 2011 at 2:35 am #

    I actually have 2 of each 99-03 gas and diesel and other than the "rattle’ from the engine and a slightly louder noise from the exhaust , there is very little difference. The engine makes more noise than the exhaust.

  4. Jeffrey Jeffor June 18, 2011 at 2:35 am #

    because there different