* A 5.0L (305 cubic inch) V8: This was a common engine choice.
* A 5.7L (350 cubic inch) V8: This was a larger and more powerful option.
There wasn't a standard engine size; it varied depending on the trim level and options selected by the original buyer. To know for sure what engine is in a *specific* 1989 Caprice, you'd need to check the vehicle's documentation (owner's manual or vehicle identification number (VIN) decode) or look at the engine itself (the displacement will be stamped on it).
