Engine Audi CZAC

The 4.0-liter bi-turbo diesel engine Audi CZAC was assembled in Germany from 2016 to 2020 and was installed on the most powerful modifications of the Bentley Bentayga or Audi SQ7 4.0 TDI crossover. There is a version of this engine without an electric turbine with the index CZAA and developing 422 hp.

The EA898 series also includes: AKF, ASE, BTR, CKDA, CCGA, CZAC, DHVA.


Production years 2016-2020
Displacement, cc 3956
Fuel system Common Rail
Power output, hp 435
Torque output, Nm 900
Cylinder block cast iron V8
Block head aluminum 32v
Cylinder bore, mm 83
Piston stroke, mm 91.4
Compression ratio 16.0
Features AVS
Hydraulic lifters yes
Timing drive chain
Phase regulator no
Turbocharging Bi-Turbo + EAV
Recommended engine oil 5W-30
Engine oil capacity, liter 9.1
Fuel type diesel
Euro standards EURO 5/6
Fuel consumption, L/100 km (for Audi SQ7 TDI 2017)
— city
— highway
— combined
Engine lifespan, km ~300 000
Weight, kg 260

The engine was installed on:

  • Audi SQ7 2 (4M) in 2016 – 2020;
  • Bentley Bentayga 1 (4V) in 2017 – 2019.

Disadvantages of the Audi CZAC engine

  • On specialized forums the motor is mostly praised, but there are also a number of complaints;
  • Most often, glitches in the operation of turbocharging are noted, which is expressed in traction failures;
  • Cases of oil level surges with the appearance of a corresponding error are also described;
  • All other diesel problems are associated with failures in the EGR, DPF and AdBlue systems.

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