Other automakers are expected to release U.S. sales figures later Tuesday. Combined, the results are likely to mark the first year-over-year monthly sales gain since October 2007.
Ford sold 181,826 cars and light trucks compared with 115,117 in August 2008, when high gas prices and growing economic uncertainty kept people away from showrooms.
Two of Ford's vehicles - the Focus and Escape - were among the top selling cars under the clunkers program. Sales of the Focus rose 56 percent while those of the Escape crossover vehicle climbed 49 percent.
Meanwhile, low supplies of fuel-efficient vehicles at Chrysler kept the automaker from benefiting more from the clunkers program, whose rebates encouraged customers to buy gas sippers in exchange for guzzlers with gas mileage of 18 mpg or less.
Chrysler sales fell 15 percent to 93,222 units.
Going into August, five of Chrysler's most efficient vehicles were already at low inventory levels. Those vehicles - the Dodge Caliber, the Chrysler Sebring, the Jeep Patriot, the Jeep Compass and the Dodge Avenger - all qualified as Cash for Clunkers purchases.
To make up for the shortfalls, Chrysler is boosting production by 50,000 vehicles of most of its vehicles through the end of the year.
Consumers are expected to steer clear of dealers this autumn now that the clunker rebates are no longer available.
Dan Strumpf reported from New York.