The BMW N74 engine was modified especially for the 2018 Rolls-Royce Phantom. The off-road Rolls-Royce Cullinan is also equipped with the N74B68. In any type of workload, this potent V12 performs exceptionally well. However, the owner’s attention must come first, and the service is flawless.
Other modifications of N74: N74B60, N74B66.
The engine was installed on:
- Rolls-Royce Phantom 8 (RR11) since 2018;
- Rolls-Royce Cullinan 1 (RR31) since 2019.
Specifications
| Production years | since 2018 |
| Displacement, cc | 6749 |
| Fuel system | direct injection |
| Power output, hp | 563 – 571 |
| Torque output, Nm | 850 – 900 |
| Cylinder block | aluminum V12 |
| Block head | aluminum 48v |
| Cylinder bore, mm | 89 |
| Piston stroke, mm | 90.4 |
| Compression ratio | 10.0 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | double VANOS |
| Turbocharging | Twin-Turbo |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 10.5 |
| Fuel type | petrol |
| Euro standards | EURO 6 |
| Engine lifespan, km | ~330 000 |
| Firing order | 1-7-5-11-3-9-6-12-2-8-4-10 |
Disadvantages of the N74B68 engine
Rapid coking at idle is the primary issue with the motor; coking in oil lines can cause turbines to fail up to 100,000 kilometers;
The Double VANOS system may already need maintenance after 150,000 kilometers;
Timing chains frequently stretch after 150,000 kilometers, and replacing them will be costly;
Additionally, the engine’s valve stem seals quickly tan and lubricant consumption becomes apparent.