will an alternator from a 90 acura fit a 02 honda accord
That's a big stretch. You don't even specify which model acura nor the engine sizes, but even with that info, NO.
No the 90 Acura is not a computer controlled alternator, the 02 accord is computer controlled.
Search Honda Accord Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Honda Accord Experts