modifiying garage to park 360, approach angles?

the recently acquired 360 spider cannot get into our basement parking lot at our office, we own the building so we want to modify it, when you come in, it is very steep, i'd say a good 30 to 35 degree angle, leaving the garage with the range rover is easy, but my uncle wants to bring the ferrari to work adn keep it downstairs instead of on the street. what are the angles we can work with, have any of you modified your garages or indoor parking lots to accomodate a car? if so please give me all info that would help. thanks

 

see the problem is getting in the garage, the has not been able to make it to the bottom, i think it can climb the incline, it's getting in, because it drops so steeply, the car bottoms out on the top, that's the problem.