How much horsepower is in a 1979 Pontiac trans am?

The horsepower of a 1979 Pontiac Trans Am varied depending on the engine option. The most common engine was the 400 cubic inch (6.6L) V8, but even that came in different variations with different horsepower ratings. You'll find it ranged from approximately 150 hp to 220 hp. Some high-performance versions could have even slightly more depending on modifications, but those were less common. To know the exact horsepower of a specific 1979 Trans Am, you'd need to know its engine code and options.