A Level Requirement for Ivy League and Stanford

Hi Crimson, What are the grade requirements regarding A Level for Ivy League and schools like MIT, Stanford.

Would 4 AS Levels and 3 A Levels be enough.

The 4 AS Levels I did- English General Paper, Economics, Mathematics, Computer Science.
The 3 A Levels I did- Economics, Computer Science and Mathematics.

I have 4As and 3A* in all my exams.

I have also given the SAT and scored 1500+. For Subject Tests- Math 2- 800, Physics- 800 and US History- 800.