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Internal combustion engines are now operating at about 30-40 % efficiency with the application of computer controls and continues to get better all the time.

I am not sure of the efficiency rating of external combustion or central combustion engines. I will make an attemp to find out. Note that these engines to my knowledge are only used by the military in torpedoes so I am not sure if there is any info available to the general public.

I have seen electric motors up to 55% efficiency. I am not sure if there are more efficient motors out there but I would bet yes.

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15y ago

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