Fiat 500 Diesel
Fiat offers a few powertrain choices for the 500 that improve the small car's fuel efficiency, like a two-cylinder small displacement engine and the all-electric plug-in option (well, in concept form, at least). A better diesel option will be coming soon with the addition of a new 1.3-liter 16-valve MultiJet diesel engine that improves fuel economy to 60 miles per gallon (U.S.).
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