In a bowl, mix together the flour, baking powder, 2 cups sugar and salt.
Add the oil, orange juice, eggs and vanilla and beat until mixed.
In a separate bowl combine the 5 tablespoons sugar and cinnamon and mix.
Layer the batter, apples and cinnamon mixture 1/2 at a time in a greased and floured bundt pan.
Bake at 350 degrees for 1 1/4 hours or until a toothpick inserted in the center comes out clean.