As Machinery_Frank already stated, you can make tests with the free Lite-C to see whether it fits with your requirements, pushing F11 shows you a debug panel with the count of fps, tris, objects, functions running etc.
The engine of Lite-C and A7 is quite the same, Lite-C lacks only some additional features like shaders, decals, beams, file packer, automatic LOD, compiling to an exe.