Gull Wing Doors:

The hinges on these doors are located on the roof thus a strong roof
and/or a light door is necessary. These were made popular by the classic Mercedes Sports coupes back in the heydays. It might be hard to make this modification to your car since the roof is converted to be part of the door.

The advantage of these type of doors is that when properly designed and
counterbalanced, such as the Delorean (Think “Back To The Future Car”),
they require little side-clearance to open and allow much better entrance
than conventional doors.

Some of the disadvantages of the gull wing door system were not so easy
to address. For example, the gull-wing design makes designing a convertible version of the car virtually impossible since, for optimal efficiency the hinges must be placed as close to the center of the car as possible. It also makes sealing the car against water leaks more difficult. They are aptly named because, when opened, the doors evoke the image of a seagull’s wings.