Hot cars of top 10 include Ferrari 's SA ##4 , Bugatti 's Super Sport , Jaguar 's electric C - Class . The contest pushed designers to come up with a conventionally powered vehicle that would top 100 MPGe ( miles per gallon energy equivalent ) . Some of them were unveiled at the 2009 Paris auto show . They competed for the $ 10 million Automotive X Prize .
Hot cars of top 10 include Ferrari 's SA ##4 , Bugatti 's Super Sport , Jaguar 's electric C - Class . Some of them were unveiled at the 2009 Paris auto show . They competed for the $ 10 million Automotive X Prize .