My understanding of the power loss is that it is a percentage loss. If you are losing some percentage on a Honda or other economy car you are not losing much. Compare that to a similar percentage of say a 500E's output.

Plus I'd bet good money there is more going on in the engine management systems of a M119, M104, or M113 than your average honda motor. There is some kind of temperature (both ambient and engine temp)/performance issue going on with the DOHC MB cars that isn't readily apparent.

Lee