We reported recently that the EPA had gotten back with a pretty miserable 52 mpg rating for the Fisker Karma extended-range EV. Now Fisker has received its rating from the European certification agency Technischer Üeberwachungs Verein (TÜV), and it has come out at 112 mpg. That's a huge difference, which calls into question the ways rating agencies test extended-range EVs. There is always a difference in the mpg ratings of European and U.S.-tested vehicles, but this gap is so large as to render these numbers meaningless to the consumer. Why did one agency achieve 112 miles per gallon while the other only managed half that efficiency?
