"sufficient room" is correct and usable in written English.
You can use it when you want to describe a situation in which there is a sufficient amount of space for a particular purpose. For example, "The room had sufficient room for everyone to sit comfortably."
Accordingly, both inflow pressure and intra-organ inflow resistance at the baseline must be sufficiently high to leave sufficient room for autoregulation of organ blood flow to occur.
The design of Structure Brought to Light is perhaps over-precious but leaves sufficient room for Labrouste's legacy.
The plants, whether cassava or cabbage, should also be spaced appropriately so the roots have sufficient room.
Mrs. P. Hunloke, who judged them, was continually requesting her audience to allow her sufficient room to move.
They all fit nicely inside the building, with sufficient room between rows for visitors to view and photograph them.
However, many industry watchers are sceptical there is sufficient room in the market for even a modest target circulation of 100,000.
Social housing built using government money is currently subject to mandatory space standards to ensure sufficient room for family life, furniture and household equipment.
There may not be sufficient room for both him and Wade on the plane but England now have the luxury of genuine choice.
There are all of two stools at the bar (there is sufficient room for standing, though), and on a recent evening both of them are available.
But none of the actors have been granted sufficient room for a real performance, and we never believe in the characters enough to care about what happens to them.
Not only did his leisure time wane, he said he got caught up in the "addictive" pace of work, and eventually decided to leave Amazon because he did not feel there was sufficient room for advancement.
