1990 Honda accord starter interchangeable with 1992 prelude starter?

Yes, if the engine(2.2l) is the same. There are 2.2l and 2.3l Preludes. If your car has 2.2l then it will fit properly. Prelude and Accord share many of the same parts. If I were you, I woud ask the seller if the part is for 2.2L or 2.3L. U.S and CAN have the same cars models(sometimes with different names). There's no difference.