First of all this is dangerous and not recommended to do.
Second, top speed depends on a lot of factors like the wind direction, tire pressure, load, type of fuel, etc.
The 4th gear in a 4 speed auto is over drive which is meant for cruising at low rpms like the 6th gear in a manual Altis. The manual 1.6 Altis (previous gen) does not go beyond 180kmph in 6th gear but touches 200kmph when shifted to 5th gear.
Shift it to D3 if youre really adamant to touch 200kmph but whats the point?
Drive safe.