Ford inflated the fuel efficiency of its two new hybrids, the C-Max and the Fusion, according to Consumer Reports. Each car’s fuel economy falls about 20 percent short of that reported by the manufacturer. After running tests on each model, Consumer Reports found that the Fusion hybrid achieved about 41 miles per gallon on the highway, 35 mpg in the city, while the C-Max delivered 38 mpg on highway driving and 35 mpg in the city. According to Ford and the Environmental Protection Agency, both models were to hit about a combined 47 miles per gallon.

“These two vehicles have the largest discrepancy between our overall-mpg results and the estimates published by the EPA that we’ve seen among any current models,” Consumer reports said in a blog post on its Web site.

Ford, however, is likely to blame the discrepancy on driving conditions, as it has previously reported its C-Max and Fusion could achieve a range of fuel economy figures, including some that exceeded 47 miles per gallon.

“This reinforces the fact that driving styles, driving conditions and other factors can cause mileage to vary,” Ford spokesman Wes Sherwood told Reuters.

If Consumer Reports’ motorists were driving aggressively, their driving styles didn’t impact other models mpg. Of the current models it tested, more than 80 percent of the vehicles fell within two miles per gallon of manufacturers’ estimates. The Fusion hybrid, however, was off by 8 mpg, while the C-Max fell shy by a full 10 mpg.

“Make no mistake; both the Fusion Hybrid and C-Max Hybrid still deliver excellent fuel economy,” Consumer Reports said. “But our tests show that buyers shouldn’t expect the stellar 47 mpg that Ford is promoting.”

[Image via Darren Brode/Shutterstock]