The 1984 Ford F-150 came with several engine options. There wasn't just one engine size. To know the engine size of a specific 1984 F-150, you'd need to check the vehicle's documentation (like the owner's manual or a vehicle identification number (VIN) lookup) or look for an engine identification tag on the engine itself. Common engine sizes for that year included:
* 2.3L 4-cylinder: A smaller, less powerful option.
* 4.9L I6 (300 CID): A very common inline-six engine.
* 5.0L V8 (302 CID): A popular V8.
* 5.8L V8 (351 CID): A larger, more powerful V8.
Without more information about the specific truck, it's impossible to say for sure which engine it has.
