* 3.9L Magnum V6: This was a fairly common engine option.
* 5.2L Magnum V8: A larger and more powerful V8.
* 5.9L Magnum V8: The largest and most powerful engine typically offered.
To know for certain which engine is in *a specific* 1999 Dodge Ram 1500 2WD, you'd need to check the vehicle's documentation (owner's manual, VIN sticker) or the engine itself (the displacement is usually stamped on the engine block).
