Click the bus for the audio. The reason I asked this is because I can actually hear it. Sounds like that 2023 ElDorado E-Z Rider II bus I rode with a Cummins B6.7 engine but it was a 2021 Coach & Equipment Ford E-450 with a 7.3L Godzilla V8 engine and the AC growl isn’t so loud that it makes the engine sound like a totally different engine (love the sound though). I think that Ford I was riding was a propane too, cuz I could smell it on the inside (similar to a dead skunk, which is pretty gross, sorry to go into that much detail. lol) Some of our other Fords are “fauxpanes” (meaning they’re basically gas buses labeled as “propanes”). Btw if you wanna know what I’m referring to, about the other bus, here: https://scratch.mit.edu/projects/1325226928/
Credits: * ABC Companies for the image.