Fisker Karma vs. Tesla Model S

Fortune's Sue Callaway puts these two alternative vehicles through their paces to find out which upstart American car company has the best cutting edge electric technology.

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Take a ride on a real Tron bike
Parker Brothers Concepts in Melbourne, Fla., have developed a futuristic, street-legal motorcycle that reaches speeds of 100 mph and can travel up to 80 miles on its 100% electric engine.





Tesla Model S: Test drive D.C. to Boston
CNNMoney took a Tesla Model S on a test drive from Washington D.C. to Boston. The all-electric car drove 450 miles with two stops to recharge at Tesla's Supercharger stations in Delaware and Connecticut.





The car collector's ultimate garage
You won't find an auto worth less than $250,000 in Barrett-Jackson CEO Craig Jackson's dream garage.





Our Tesla S made it from D.C. to Boston
CNNMoney drove a Tesla Model S from Washington, D.C. to Boston, recharging it twice at the Supercharger stations in Delaware and Connecticut.




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