I have two; I don't think they sound great. My F150s sound like tractors. Drive like one, too--you never have to go over 2,000 rpms if you don't care to, even pulling a load. Max torque around 1800 RPMs IIRC.

It's a German thing.

I think we simply call them "Sechszylinder" - six cylinders. Non-inline engines are a small percentage of engines in Germany, so we don't usually call inlines anything. The term for an inline engine is Reihenmotor (I had to look that up!), "line" or "row" engine.

No kidding? Most of the reliable German gasoline engines I know of are "inline" engines, but I am based in the US.