May 12, 2014
Richard Truett

Fiat Chrysler Automobiles, playing catch-up in the U.S. fuel-economy race, will debut a family of advanced four-cylinder gasoline engines in the next five years.

The automaker will also introduce a plug-in hybrid minivan, offer more diesel engines and continue to replace six-speed automatics with eight- and nine-speed transmissions.

Among the five full-line automakers, including General Motors, Ford Motor Co., Toyota Motor Corp. and Nissan Motor Corp., Chrysler is last in fuel economy, according to the EPA's ranking of fleetwide fuel economy.

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