Believed to have been used Emanuele Pirro in the first part of the 1994 Campionato Italiano Superturismo. He would switch to RT13 later in the year.

In 1995, this car together with RT06 went to Australia, where it was driven by Greg Murphy in the Australian Super Touring Championship, as well as the non-championship Grand Prix support and Gold Coast events.

At the end of the year, one of the two cars were sold to Czech team Stuard, although it is not if this was RT05 or RT06