This version of the BMW N74 engine was created specifically for the new 2018 Rolls-Royce Phantom. The N74B68 is also installed on the off-road Rolls-Royce Cullinan. This powerful V12 excels in any kind of workload. But the attention of the owner requires priority, and the service is impeccable.
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
- The main problems of the motor are associated with rapid coking at idle;
- Turbines can fail up to 100,000 km due to coking in oil lines;
- By a mileage of 150 thousand km, the Double VANOS system may already require attention here;
- After 150,000 km, timing chains often stretch, and their replacement will be expensive;
- Also, valve stem seals quickly tan in the engine and lubricant consumption appears.
N73 engine has above mentioned bore and stroke
N74 engine:
bore: 89,0 mm
stroke: 90,4 mm
Thanks, the bug has been fixed!