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How much horsepower does the 3.5 EcoBoost Flex have?

The Ford Flex with the 3.5-liter EcoBoost V6 delivers about 365 horsepower, a figure that sits above the standard 3.5-liter V6 option which was roughly 287 horsepower. Exact numbers can vary slightly by model year and market, but 365 hp is the widely cited figure for the EcoBoost variant in most Flex configurations.


Engine details and performance context


The 3.5L EcoBoost is Ford’s twin-turbocharged V6 that combines power with efficiency for larger Ford models. In the Flex, this engine is paired with an automatic transmission and available all-wheel drive, contributing to stronger acceleration and highway performance relative to the naturally aspirated counterpart. Ratings are typically given as SAE net horsepower, and official numbers can shift a few horsepower depending on year-specific calibration and testing standards.


Power figure snapshot


Here are the core power figures commonly cited for the EcoBoost-equipped Flex:



  • Horsepower: 365 hp


Note: Exact rating can vary by year, market, and the specific vehicle’s window sticker or VIN build sheet.


EcoBoost vs. non-EcoBoost in the Flex


Ford offered the Flex with two 3.5-liter V6 configurations. The EcoBoost version delivers a notable horsepower advantage over the non-EcoBoost variant, which generally produced about 287 horsepower. This gap translates to quicker acceleration and stronger overtaking capability, particularly when the vehicle is loaded or traveling on highways.


Owner experience and reliability context


Owners typically report that the EcoBoost Flex feels more responsive in everyday driving, especially when a quick response is needed for merging or passing. As with any turbocharged engine, performance can be influenced by factors such as maintenance history, fuel quality, and service intervals. When shopping used, verify the exact engine specification on the window sticker or via the VIN to confirm the horsepower rating for that specific vehicle.


Summary


The 3.5 EcoBoost-powered Ford Flex is generally rated at about 365 horsepower, with minor year-to-year variations possible. This marks a clear performance boost over the non-EcoBoost 3.5 V6 option (around 287 hp). Always reference the vehicle’s documentation to confirm the precise rating for a given model year and build.

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Kevin Bennett

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Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.