Recently announced US Fiesta 1.0 EcoBoost could be the most fuel-efficient non-hybrid car image

We just told you about its existence and now, the US Environmental Protection Agency has certified the 2014 Ford Fiesta with the 1-liter, 3-cylinder EcoBoost engine as reaching 45 mpg (5.23 l/100 km) on the highway and 32 mpg (7.35 l/100 km) in the city.

With the 3-cylinder, turbocharged gasoline engine that has won numerous prizes, the 2014 Ford Fiesta will have an EPA-rated 45 miles per gallon range on the highway – which is actually 1 mpg above the 2014 Honda Insight hybrid’s 44 mpg rating, and also 3 mpg better than what Volkswagen offers with its Golf diesel with a manual transmission.

“We’re pushing into fuel economy numbers only seen on hybrids and diesels,” said Joe Hinrichs, Ford’s President of the Americas. “Coupled with the new Fiesta ST, Fiesta covers the performance-efficiency continuum in the subcompact segment better than any other nameplate in the market.”

Still, the new Fiesta, due in dealerships in December, has one true competitor – the 2014 Mitsubishi Mirage CVT, an underdog that is certified for a combined 40 mpg, 3 mpg above what the Fiesta’s EPA-certified rating of 37 mpg offers.

The small turbocharged engine churns out 123 hp and 125 pound-feet of torque. The Fiesta can be bought as a sedan and a five-door hatchback, with a select choice of automatic or manual transmissions.