New S197 mustangs tip the scales around 3300 Lbs. the GT500 comes in around 3500lbs.
3400
http://auto.howstuffworks.com/1965-1966-ford-mustang-specifications.htm
You would have to refine your answer because they weigh different by years and model and trim level.
That would depend on which engine you have and what year of Ford Mustang
How much does a 2008 Ford Mustang GT cost?
The 1998 Ford Cobra curb weight is 3,391 Coupe 3,531 Convertible
How much is a 1984 Ford Mustang worth (Bluebook). how much i sell my car fo
The V6 - 2000 Ford Mustang is 190 horsepower
the 1964 ford mustang cost about 2400 dollars
Too much
a 67 mustang cost about $30,000
The 2007 Ford Mustang V6 has 210HP