The maximum speed of a mustang?

Answer 1

The same thing dictates a Mustang's top speed as every other car. It all depends on horsepower/torque, weight, aerodynamics, and gearing. Since the Mustang has always had multiple engine and gearing options, there simply isn't one answer. It all really does depend on what each individual car has in it. An old big block car with 4.50 gears will most certainly be redline limited. A six cylinder car with 2.70 gears will most certainly be drag limited. Not to mention that the same car with the same engine will have a different top speed with each different gear ratio. So sorry, no straight answer for you.