: The steady rumble helps quiet "racing thoughts" or overactive brains that struggle to focus in total silence.
💡 : If you find this specific engine too "clattery," look for recordings of V6 or V8 diesel engines , which offer a smoother, deeper "thrum" with less mechanical tapping. Knocking noise at idle when warm - TDIClub Forums
: Diesel engines operate under high compression, creating deep, low-frequency vibrations that users often feel as much as they hear.