Engine BMW N74B68

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.


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.

2 thoughts on “Engine BMW N74B68”

  1. N73 engine has above mentioned bore and stroke
    N74 engine:
    bore: 89,0 mm
    stroke: 90,4 mm

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