yeah and iran has no chance of winning it at all, considering the massive and ongoing military uprise of the Saudis and its net of allies.
Assuming by "Saudi and it's allies" you are talking about
just the GCC, why on Earth would you think they could defeat Iran in a full-blown conventional war?
Other then technology (and even then, not by
that much) Iran outclasses them in almost every way. Numbers, leadership, economy, national unity, everything. The only thing saving the GCC from total defeat in this scenario is the Gulf itself.