* 350 CID (cubic inch displacement) V8: This was a very popular choice. Several variations existed, with different horsepower ratings depending on the carburetor and other specifications.
* 400 CID V8: Another common and powerful engine option. Again, horsepower varied depending on the configuration.
* 428 CID V8: This was a larger, more powerful engine, often found in higher-performance versions of the Lemans.
* Smaller 6-cylinder engines: The Lemans was also available with smaller inline six-cylinder engines, although these were less common than the V8s. The exact displacement of the six-cylinder would vary, depending on model year specifics.
To know the exact engine size in a *specific* 1969 Pontiac Lemans, you'd need to check the vehicle's documentation (like the original owner's manual or the vehicle identification number (VIN) decoder). The VIN contains information about the engine.
