Editor's note: A previous version of this report incorrectly stated which Fiesta trim level gets 45 mpg. The correct trim is the SE with manual EcoBoost package.
DETROIT -- The U.S. Environmental Protection Agency has certified the 2014 Ford Fiesta, equipped with Ford's 1-liter, three-cylinder EcoBoost engine, at 45 mpg highway, the highest mpg for a non-hybrid gasoline car.
The EPA rated the 2014 Fiesta SE with manual EcoBoost package at 32 mpg city, 45 mpg highway and 37 mpg combined. The SE, which will be sold only with a five-speed manual transmission, arrives in dealerships later this year. The mpg rating applies to both four- and five-door versions of the Fiesta.
Prices for the Fiesta 1-liter start at $16,740 including shipping.
Among competitors, Chevrolet's 2014 1.2-liter, four-cylinder Spark is rated at 31 city/39 highway; Toyota's 1.3-liter, four-cylinder Scion iQ is 36 city/37 highway. The only other vehicles available in the United States with three-cylinder engines are Daimler's Smart car, EPA rated at 34 city/38 highway, and the upcoming Mitsubishi Mirage with a 1.2-liter three-cylinder rated at 37 city/44 highway. That car is on its way to dealers now. The 2014 Volkswagen Passat diesel is rated at 31 mpg city/43 mpg highway, 35 mpg combined with a manual transmission.
Ford will continue to offer the Fiesta SFE -- Super Fuel Economy -- version even though its EPA rating of 30 city, 41 highway and 34 combined is lower than the 1-liter EcoBoost Fiesta.
The 1-liter EcoBoost was developed in Europe, where it is sold in five nameplates. Ford said the pint-size engine accounts for 32 percent of Focus sales and 26 percent of Fiesta sales in Europe this year.
Ford has doubled production of its Cologne, Germany, engine plant to 1,000 engines per day to keep pace with rising demand.
"With the new Fiesta 1-liter EcoBoost, we're pushing into fuel economy numbers only seen in hybrids and diesels," said Joe Hinrichs, Ford president of the Americas.
The 1-liter is the second new EcoBoost engine Ford has introduced in the Fiesta this year. Ford is already selling the performance Fiesta ST, powered by a 1.6-liter, four cylinder EcoBoost engine. Ford also offers the carryover 1.6-liter normally aspirated four-cylinder engine in the Fiesta.
Richard Truett contributed to this report.