This listing is for a 1991-1993 MR2 with OUT power steering. NA or turbo engine does not matter in determining the correct alternator. This is the correct unit for a manual steering 91-93 MR2
The Power Steering Alternator has higher Amperage than non power steering. This has the lower amps.
Take note that power steering mr2’s also have a different alternator bracket and it is said that the bracket must match the alternator. Meaning, if you have a manual steering rack, you must change out the alternator bracket to fit the power steering alternator. They do not interchange
Furthermore, This has the round plug found on 91, 92 and some 93’s.
Some 93’s, all 94 and 95’s have an oval plug.
