A Rolls Royce Ghost 6.6 V12 612hp makes about 700 hp and 950 Nm with Stage 1 software, compared with 612 hp and 840 Nm from the factory. That is 88 hp and 110 Nm extra.
This is a petrol engine with a displacement of 6,592 cc and engine code N74 B66 A.
Besides Stage 1, the following options are available for this vehicle: DTC Removal.
Frequently asked questions
How much power and torque does a Rolls Royce Ghost 6.6 V12 612hp gain with Stage 1?
About 88 hp and 110 Nm: from 612 hp / 840 Nm to roughly 700 hp / 950 Nm. The exact gain depends on engine condition and fuel quality.
Which extra options are available for a Rolls Royce Ghost 6.6 V12 612hp?
DTC Removal.
Figures are indicative and vehicle specific. Check the regulations that apply in your country before modifying engine software.

