I agree that a power figure will push an object with a drag co-efficient through the air at a varying road resistance. This is often limited by gearing.
By increasing the power from 225 to circa 265 using gearing that is taller than the standard power can handle you will reach top speed with air resistance as your enemy. If the gearing is such that the car redlines before this, it suggests that the gearing has nothing left to give.
Someone answered that the redline is the restriction. So, basically the extra power at the redline from 225 to 265 suggests to me that 6th gear ratios are the restriction in achieving a higher top speed, not air and road resistance.
Being realistic, an LCR will never do 200. To gain additional speed takes exponential increases in power to overcome the increasing resistance.