It is also partly because Chrysler offered more incentives than Ford. On average about $800 more.The No. 3 U.S. auto maker sold 146,151 vehicles on a retail basis, likely representing the first time it outpaced Ford in the closely watched portion of the monthly sales that are sold to individual consumers at dealerships. Overall, Ford solidly outpaced its smaller rival—selling 224,681 vehicles overall compared with Fiat Chrysler’s 185,035. But that difference was due to Ford selling 35% of its vehicles to fleet buyers such as commercial users, governments and rental car companies.