Mythical android 3d models optimization

This is the question of optimizing the game (perhaps about a miracle-optimizing button that I do not know about)

As far as I know CSR Racing 2 is made in Unity

And the car model has about 30 000 triangles, in my garage is 6 cars, 30 * 6 = 180 000 triangles + garage. All this is displayed in 1280 * 720 and gives 60 fps, including amazing shaders, textures and effects.

Why is my cube that I created for the test having 100,000 triangles, gives 20-30 frames when I run it, without textures, effects and with a shader mobile diffusion.

What a magical button I lost, I tried a lot of options for building, adding linear and gamma light, nothing makes a difference.

My device is Nexus 5, snapdragon 800, but this is not important, because I compare 2 games on one engine and on one device

Could you please share your test project?

Here it is, now gives me 28 FPS, 100 000 verts, 200 000 tris. Just one model.
How i can optimise this project?

https://drive.google.com/open?id=1WQlyJui4qfUnXiEss_22uqlX3DXxjnA0