BMW and Rolls-Royce have been in bed with each other for quite some time, not just as an automobile manufacturer, but also an airplane engine collaboration that dates back nearly a century ago. When BMW and Rolls-Royce started collaborating on motor cars in the 2000s, often it was Rolls-Royce models being based off of BMW 7-Series architecture with the same engines and transmissions as the 7-Series.
However they were obviously modified to provide more power and to better suit the applications of massive slabs of British and German steel and plastic. Now, rumor has it that Rolls-Royce is developing their own V12 engine and that engine will be serving duty in the lesser BMW 7-Series, rather than BMW’s V12–which dates back to the 1980s in terms of basic design–serving duty in the Rolls-Royce.
Rumor comes in from Motor.es and the new V12 is said to displace 6.6L with two turbochargers to churn out more than 600bhp.