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.
When fitted with a four cylinder engine, the 2008 Audi A4 Quattro sedan and Avant Quattro wagon rank among the most fuel efficient all wheel drive vehicles sold in America.