yeah, the voltage will be 1/4th or whatever but because you have 4 times as many turns and therefore 16 times as much resistance the ouput power of the alternator is only 1/16th what it would be with neo's for the same losses.
however ferrites are about 1/16th the cost... its still not worth it. 10 minutes of google searching will get you a 200 page book that explains this stuff, i can't remember the title, can post it if you want later.