I don't know if anyone has any data to report. The Prius was lucky in that the Dept. of Energy took a special interest in the technology. They took the parts to the lab, ran the experiments and reported the results. Toyota engineering has also published a number of very insightful papers. Then too, I have an NHW11 03 Prius and seek these sources. But you raise an interesting question, how do we evaluate the ICE-to-wheel efficiency of other vehicles?

If I were doing it, I'd mount strain gages or put optical strain marks on the ICE shaft to the transmission and simular strain gages on a drive wheel. This would provide the torque and along with RPM, the power-in and power-out . . . piece of cake. A great assignment for undergraduate engineering students.

Bob Wilson

Operation Iraqi Oil Freedom:

Automatic, stock, project car.

My other 1500 cc car:

Automatic, stock, backup car.
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