* LS1 (5.7L): This was the most common engine and produced 305 horsepower.
* LT1 (5.7L): While less common in '97, some might have had leftover LT1s from previous years, which produced around 285 horsepower.
Therefore, you'd need to check the vehicle's specifications to know for sure which engine it has. But 305 horsepower is the most likely answer for a 1997 Trans Am with a V8.