271
It depends on the type 200 BHP, 225 BHP or 271 bhp
289 4v 225 hp
289 with 2 barrel carb has 200 h.p.289 with 4 barrel carb has 225 h.p. 289 High Performance has 271 h.p.
That year came with the 5.3 L v8 and it has 289 horsepower and 11000 lbs of torque
Around 200 net hp
460 lbs
The 1964½ Ford Mustang did not have a 289, it had the 260 (which was rated at 164 hp). If your car has a 289 it is either a 1965 or does not have the original engine. A good way to tell a 1964½ from a 1965 is whether it has a metal dashboard or a padded dash.
The 1965 Ford Mustang offered a range of engine options, with horsepower varying accordingly. The base 170 cubic inch inline-six engine produced about 105 horsepower, while the 260 cubic inch V8 engine generated around 164 horsepower. The more powerful 289 cubic inch V8 option could produce either 210 or 271 horsepower, depending on the specific configuration. Overall, the Mustang's horsepower varied significantly based on the engine choice.
Probably 225, unless it's a hi-po then 271
A 1965 Shelby Mustang , 289 V8 , was rated at 306 BHP
From the Mustang forums:The 1964 Mustang did not have many models, just the coupe and the convertible. The biggest difference was that there were four different engine options for the coupe and convertible. These included a 170 cubic inch engine with 105 horsepower with 9.1:1 compression and a carburetor with one barrel, a 260 cubic inch engine with 164 horsepower with 8.8:1 compression and a two barrel carburetor, a 289 cubic inch engine with 210 horsepower with 9.0:1 compression and a four barrel carburetor, and finally the most powerful 289 cubic inch engine with 271 horsepower, 10.5:1 compression, and a four barrel carburetor. Consumers loved the different engine options on the coupe and convertible.http://mustangforums.com/timeline/1964-ford-mustang/P.S. It's rather easy to Google this kind of information :)
A 289 engine typically refers to a Ford V8 engine with a displacement of 4.7 liters.