Engine BMW N73B68

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.


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.

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