"Our engineering team is looking at lots of concepts," chief executive, Ian Robertson told Automotive News.
Currently company sells only the 323 700 Euro Phantom.
Former BMW SA MD Robertson said the Goodwood, England, factory, could easily double its 1 000-cars-a-year capacity.
Last week Rolls-Royce approved the design of a new convertible that will be similar to the 100EX Centenary Experimental Car introduced at the Geneva show in 2004. It is expected to go into production in 2007.