The answer that I came with was, had an interest in the success of Rome, since they could improve their status by demonstrating their loyalty to their conquerors. I just learned about this over the summer semester when I took western civilization. Roman is rich in history but then again I think all countries are. :)
The New Jersey Plan was favored by smaller states because it gave equal representation to all states. The Virginia Plan, in contrast, distributed representation based on population, which naturally favored larger states.