It all depends on which Mustang you are talking about. The 2011 GT500 is reputed to have a top speed of over 160 mph!
The top speed for the 1966 Ford Mustang is around 150 to 170
The top speed of the 2009 Ford Mustang (GT) is 145-155 mph.
top speed of the ford cougar is 140 mph
The 2010 ford mustang Gt is quoted at a top speed of 151mph.
The 2010 Mustang GT is speed limited by Ford at 149 MPH.
The top speed all depends on the engine because there were a few options
about 170-180
100 to 180 try it
The 2008 Ford Mustang Bullitt has a factory speed limiter set at 151 miles per hour.
149 as set by Ford at the factory.
115... limiter kicks in
The top speed of the 2010 Ford Shelby Cobra GT500 is 155 mph. The GT500 convertable can go from 155-157 mph.