A model of maruti 800 car you can use. its shaded well using blender cycles shaders, should convert well with eevee as well. Its not textured, just shaded. high poly model, subdivision workflow compatible.
OBJ (OBJ, filesize: 52.1 MB), BLEND (Blender, filesize: 48.9 MB), DAE (Collada, filesize: 88.8 MB), FBX (Autodesk FBX, filesize: 18.3 MB)