* Pontiac 400 CID (6.6L) V8: This was the most common engine, available in various power outputs depending on the carburetor and other components. Power ranged from around 180 hp to 220 hp.
* Oldsmobile 403 CID (6.6L) V8: A less common option, but available in some models. Power output was typically in a similar range to the Pontiac 400.
There were no smaller, more fuel-efficient engines commonly offered in the 1979 Trans Am like some other models of that era. The muscle car image of the Trans Am was heavily tied to its larger V8 engines.