Generally, you'll find these figures:
* 1990 Mustang GT (5.0L): The GT typically produced around 225 horsepower and 300 lb-ft of torque. This was true for both manual and automatic transmissions, though slight variations might exist due to testing methods and individual engine variation.
It's crucial to remember that these are *manufacturer's claimed figures* and actual horsepower and torque at the wheels can vary due to many factors, including condition of the engine, drivetrain losses and measuring methods. A dynamometer test would provide the actual power output of a specific vehicle.