Didn't read the article, but the engine doesn't provide 250 hp while parked and idling, that's for sure. Certainly it is inefficient compared to an engine sized

Didn't read the article, but the engine doesn't provide 250 hp while parked and idling, that's for sure. Certainly it is inefficient compared to an engine sized to provide 2 hp but that's not the same as running it at max rated power.