DETROIT -- 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.
"We will meet our regulatory requirements," said Fiat Chrysler powertrain chief Bob Lee at the company's investor day last week.
The federal government will require corporate fleets to achieve a 54.5 mpg average by 2025.