* 2.0L Duratec I4: This was the most common engine.
* 1.8L Duratec I4: A smaller engine option, less common than the 2.0L.
There may have been slight variations in horsepower and torque depending on the specific model year and trim. To know the exact engine size for a specific 2010 Ford Focus, you'd need to check the vehicle's identification number (VIN) or the vehicle's documentation.
