2014 Ford Fiesta with EcoBoost is the Most Fuel-Efficient Non-hybrid in America
October 30, 2013 10:01 AM
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1.0-liter EcoBoost achieves 45 mpg on the highway
Ford has officially announced that the 2014 Fiesta using the new and very small three-cylinder 1.0-liter EcoBoost engine is officially the most fuel-efficient non-hybrid vehicle in America. The little 1.0-liter engine is able to achieve 32 mpg in the city, 45 mpg on the highway, and 37 mpg combined.
Those official fuel efficiency ratings are dead on with Ford's promise of
achieving mid-40 mpg efficiency
when it first announced the tiny three-cylinder engine in November 2012. Ford says that the Fiesta is the only subcompact in its class able to deliver 45 mpg on the highway while producing over 120 hp.
Ford says that its 1.0-liter Fiesta achieves fuel efficiency of 12 mpg higher than the Honda Fit and 8 mpg higher than the Toyota Yaris on the Highway. The 1.0-liter EcoBoost Fiesta gets better fuel efficiency than some competitors’ diesel and hybrid vehicles. Ford specifically calls out the 2014 Honda Insight, which achieves 44 mpg on the highway and the 2014 VW Golf diesel with a manual transmission that achieves 42 mpg on the highway.
Despite being incredibly fuel-efficient, the 1.0-liter EcoBoost engine reduces 123 hp and 125 pound-foot of torque. The vehicle also features an overboost setting allowing the car to make 145 pound-foot of torque for up to 15 seconds.
The 2014 Ford Fiesta with the 1.0-liter EcoBoost is set to hit dealer showrooms later this year.
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10/30/2013 3:29:33 PM
Diesel weighs 15% more per gallon than gasoline, meaning it simply concentrates a greater amount of fuel (energy) into a smaller volume. Its energy density per volume is about 12% higher than gasoline, so divide all those diesel mileages by 1.12 to get a fair comparison of how far the car is going on the same amount of energy.
This is the reason planes and rockets measure fuel quantity by mass. That eliminates fuel density as a factor (which can change with capricious things like temperature). Unfortunately we measure car fuel economy in MPG, when lbs per 100 miles would be a much better measure.
10/31/2013 1:18:56 AM
In a 4-cycle engine, torque scales with displacement. Since diesel engines produce much more torque than petrol engines, the added weight of diesel doesn't take a hit on overall efficiency as it would on a petrol engine.
This is why large trucks with petrol engines are incredibly stupid, especially if your adding to the already ridiculous curb weight (passengers, towing, 25 gallon fuel tank, etc.)
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