American AI is usually American Airlines, and usually appears because of a baggage fee paid at the airport, or a purchase made during a flight. posted 09/11/2012 Helpful (4)
Electric motors are in general, a lot more efficient that internal combustion engines. An average combustion engine has about 18â20%. A formula one engine, has about 50% of an efficiency.
Petrol... Modern gasoline engines have an average efficiency of about 20% to 30% when used to power a car Diesel... The most efficient type, direct injection Diesels, are able to reach an efficiency of about 40% http://en.wikipedia.org/wiki/Engine_effi...