That’s around $100,000 to $200,000 less than the top-line Phantom. Rolls-Royce executives said the RR4 will have a more informal presence than the company’s stately Phantom line, and will be more geared toward driving than being driven. The company, a subsidiary of BMW, said the RR4 will be powered by a new engine that is unique to Rolls-Royce. The RR4 is expected to go on sale in 2010.