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.
Other modifications of N73: N73B60.
The engine was installed on:
- Rolls-Royce Phantom 7 (RR1) in 2003 – 2017.
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 |
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.
