* 4.6L V8: This was the most common engine.
* 5.4L V8: This was a larger, more powerful option, but less common.
To know for sure which engine *your* specific 1997 Ford Expedition has, you'll need to check the vehicle's documentation (owner's manual or vehicle identification number (VIN) decode) or look at the engine itself. The displacement (4.6L or 5.4L) will be clearly visible on the engine block.
