Does anyone know what the differences are between a 1986 325 and 325es. I was under the impression that the 325es had an EPA engine which wasn't as strong as in the 325. But having driven a few 325s I'm led to believe otherwise it seems a little underpowered and has a really low redline (about 4500). Can anyone also tell be how I would be able to tell a 325 from a 325es from a visual inspection.