This package contains 16 different low-poly cars and some of them have few skins:

• Pickup (3 textures); [2376 tris]
• Family car (3 textures); [2296 tris]
• Family car with a black roof (3 textures); [2284 tris]
• Jeep wrangler (3 textures); [4265 tris]
• Off-road jeep (3 textures); [4337 tris]
• Mini car (3 textures); [2050 tris]
• Sport car (3 textures); [2082 tris]
• Muscle car (3 textures); [2945 tris]
• Jeep (3 textures); [3694 tris]
• Police car (2 textures); [2074 tris]
• Taxi car; [2759 tris]
• Tow truck; [4100 tris]
• Ambulance; [3512 tris]
• School bus; [3512 tris]
• City bus; [4081 tris]
• Fire truck. [7252 tris]

I recommend us these models in-game engine with unlit texture.