Its a garden ornament.
If it had wheels but no motor, it'd be called a cart with an ox pulling it.
Old school language says its a shell with motor and running gear.
If it had no motor, no transmission, no interior, no running gear, no bolt-on / weld-on panels. Its just a plain ol' shell.
Unless it was a model A etc then it'd be a restorers wet dream.
:)