* 2.3L 4-cylinder: This was a very common option.
* 2.9L V6: A more powerful choice than the 4-cylinder.
* 4.0L V6: A larger, more powerful V6, though less common than the 2.9L.
To know for sure which engine is in *a specific* 1990 Ford Ranger XLT, you'd need to check the vehicle's documentation (like the owner's manual or the vehicle identification number (VIN) plate) or look at the engine itself. The engine's displacement (e.g., 2.3L, 2.9L, 4.0L) is usually prominently displayed on the engine block.