Can a 1994 Honda Accord engine fit into a 1991 Honda Accord?
yes it can. You are actually able to fit the following motors in
91 accord:
f22a1, f22a2, f22b2, h22a1, h23a1, and with some work the
k24a...
Keep in mind you need the matching transmission for the
corresponding motor.
in reality you can really get any Honda motor any Honda as long
as the displacement is close..
A crazy motor swap would be a k20a or k20z.. there would be some
work, required, but this isn't bad for 200hp...