No; they are different sizes.
No, the Honda Civic springs is not compatible with any generation of the Honda Prelude.
No, they are too light to work on an Accord.
Yes 92-00 Honda springs are interchangeable
any engine will work with a little mod or alot of mods i wouldnt do it 86-89 honda accord should work
Yes
No. The Prelude has a B20A5 motor. The civic will have a D-series tranny. They will not interchange (B and D series parts do not interchange).
No. EK chassis Civics utilize D and B family engines. 4th Gen Preludes utilize F and H family engines. While it is possible (although difficult) to put a Prelude engine in a Civic, there is both no straightforward method and no logical reason to put a Civic engine in a Prelude.
Unless you fabricate them in some way to fit, it won't fit any generation of Honda Prelude.
The 97 Honda Prelude motor (h22a) will fit into a 2000 civic with custom mounts (available to purchase online), however you will need the h22a transmission, shift-linkage, axles, and ecu (full swap). The h22a motor will not work with the stock d-series transmission.
2001 Honda prelude distributor timing on 2.2
It's possible to swap in a B20 series motor from a 3rd gen Prelude to a 5th gen Civic. However, it would be more practical (and easier to swap in) a D-series motor which there are multiple variants for the Civic between the late '80s into the '90s.
No, they are different.