There's no single answer to "How fast can a Ford go?" Ford makes many different vehicles, from small cars to powerful trucks and high-performance sports cars. The top speed varies drastically depending on the specific model and year.
A Ford Fiesta will have a much lower top speed than a Ford Mustang Shelby GT500, for example. To get an answer, you need to specify the *exact* make, model, and year of the Ford vehicle you're interested in.
