It looks like Thunbergia laurifolia to me, perhaps the form with pointed side lobes at the base of the leaves, which Geoffrey Herklots called "the Singapore form".
Incidentally, Kew's Plant List currently says that Thunbergia grandiflora is a synonym for Thunbergia alata - I suspect that this is a mistake, as the "blue-flowered Bengal clock vine" (T. grandiflora) is so very different from "black-eyed susan" (T. alata).