Ethics and responsabilities of working on a team?

I’m working on a project with a bunch of architects, engineers, and many other people. Now for my teams section of the project (electricity generation), we came up with several ideas of what would work out and I have to present them to the architects. One idea that my team mate came up with, I don’t like, because it would cut the amount of electricity generated, but I know that the architects will love it. My question is, is it ethical to not inform the architects of this other way of doing it? Should all the options be laid out on the table? I mean, I don’t want them to choose it, but if I don’t tell anyone, its like me saying my opinion is more valuable than the rest of the people on the project. What does fluther suggest?