It will depend upon where you're going to put them in the room. If you can put them at the small end, and use the long dimension to get back away from them, I think they will work fine. They will certainly be very powerful in that size space.
If you have to locate them on the long dimension wall, I think it will be more of a problem to get them to fill the room properly. But, most importantly to get the listening position back far enough for them to image properly. Of course, if you can use acoustic materials on the walls and floor to adjust the room response, you may be able to work with them on whichever wall works best for the room use.
Mine are setup in a room that is 17-feet wide by 24-feet long, and has a 12-foot vaulted ceiling. I am a bit constrained as to where I can put them in that space (believe it or not). I have them setup on the 24-foot wall and they are spaced about 9-feet apart, and about 18-inches from the wall. Listening position is 13-feet from the face of the speakers.
In my room, I have a rather large window directly across from the speakers (in back of me when I'm listening to them). The glass surface reflects a lot of midrange and treble, and you can hear a standing wave from the wall if you raise the volume to "live" level - even with classical music. Unfortunately, it is not possible to put heavy drapes on the windows. I have used mini-blinds and find that if I adjust the angle of the louvers upward and slightly open, they diffuse the sound somewhat and help break up the standing wave.
This is NOT an optimum setup - but, it works. In my estimation, optimum would be to have them about 12 feet apart and 2-feet from the back wall. I had to play with the positioning within the constraints of where I can put them. The biggest changes were made by moving them away from the wall and carefully working with toe-in.
I would suggest that you can make them work in your room - IF you are willing to work with the speakers and some acoustic materials. Even things like tapestries, rugs, and furniture placement can be used to adjust room acoustics, you'll just have to be aware that using the 802's probably won't be an out-of-the box, 1-shot setup.
If you are willing to work with the speakers, the space, and the electronics - you will be amply rewarded by the listening experience.