* Regional variations: Ford offers different models in different parts of the world. A model sold in North America might not be sold in Europe or Asia.
* Model years: Models are updated and phased out annually, so the number fluctuates year to year.
* Sub-models and trims: A single model (like the F-150) often has numerous sub-models (like the Raptor, Lightning, etc.) and trim levels (XL, XLT, Lariat, etc.), which can be counted individually or as a single model.
To get a close approximation, you'd need to specify a region and year and then carefully count the distinct models offered, considering how you define "model." Even then, there will be some ambiguity.
