* 2.3L 4-cylinder: This was a very popular and often the base engine.
* 2.8L V6: This was another common option, offering more power than the 4-cylinder.
* 3.3L V6 (1977-78): A later, more powerful V6 option.
* 5.0L V8: A more powerful V8 option was available, though less common than the smaller engines (especially in later years). This V8 was significantly smaller than the V8s found in earlier Mustangs.
There wasn't *one* engine; it depended on the specific year and trim level of the Mustang II.
