I also fitted a Mulfab alu radiator and it keeps the temperature down even at relatively low speeds. In traffic the fan can easily keep the temperature below 100°C - very different from the original radiator.

-99 4/4, 1.8 Zetec, Indigo Blue, 2-seat, Suplex RS
-04 Citroen Pluriel, 1.6 Sensodrive, Met Orange