The N73B68 engine (according to some sources N73B67) was installed on the Rolls-Royce Phantom from 2003 to 2017. The volume of this giant engine is 6749 cc with 12 cylinders and a V-shaped layout. The engine block and cylinder head are made of aluminum, each cylinder block has 2 camshafts.
N73 family: N73B60, N73B68.
Specifications
| Production years | 2003-2017 |
| Displacement, cc | 6749 |
| Fuel system | direct injection |
| Power output, hp | 460 |
| Torque output, Nm | 720 |
| Cylinder block | aluminum V12 |
| Block head | aluminum 48v |
| Cylinder bore, mm | 92 |
| Piston stroke, mm | 84.6 |
| Compression ratio | 11.0 |
| Features | Valvetronic |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | double VANOS |
| Turbocharging | no |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 8.5 |
| Fuel type | petrol |
| Euro standards | EURO 4/5 |
| Engine lifespan, km | ~330 000 |
| Weight, kg | 230 |
The engine was installed on:
- Rolls-Royce Phantom 7 (RR1) in 2003 – 2017.
Disadvantages of the N73B68 engine
- The main problems are associated with rapid coking due to the direct injection system;
- The Double VANOS system is a modest resource here, sometimes less than 150,000 km;
- Still often there are vibrations at low speeds due to a malfunction of Valvetronic;
- After 150,000 km of run, they often stretch here and require replacement of the timing chain;
- The weaknesses of this motor also include a tendency to leaks and oil consumption.
Frequently asked questions about the BMW N73B68
How much power does the BMW N73B68 make?
The BMW N73B68 develops 460 hp and 720 Nm of torque.
How much oil does the BMW N73B68 take and which one?
Engine oil capacity: 8.5 liters. Recommended oil: 5W-40.
Does the BMW N73B68 have a timing belt or chain?
The BMW N73B68 uses a timing chain.
Is the BMW N73B68 turbocharged?
No, the BMW N73B68 is naturally aspirated.
Does the BMW N73B68 need valve clearance adjustment?
No, the BMW N73B68 has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the BMW N73B68 last?
The typical lifespan of the BMW N73B68 is ~330 000 km with proper maintenance.
What cars was the BMW N73B68 installed on?
Rolls-Royce Phantom 7 (RR1) in 2003 - 2017.
What are the common problems of the BMW N73B68?
The main problems are associated with rapid coking due to the direct injection system. The Double VANOS system is a modest resource here, sometimes less than 150,000 km. All known problems.
What engines are related to the BMW N73B68?
N73 family: N73B60.
