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.
EA898 family: AKF, ASE, BTR, CKDA, CCGA, CZAC, DHVA.
Specifications
| 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 |
10.7 7.5 8.7 |
| 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.
Frequently asked questions about the Audi CZAC
How much power does the Audi CZAC make?
The Audi CZAC develops 435 hp and 900 Nm of torque.
How much oil does the Audi CZAC take and which one?
Engine oil capacity: 9.1 liters. Recommended oil: 5W-30.
Does the Audi CZAC have a timing belt or chain?
The Audi CZAC uses a timing chain.
Is the Audi CZAC turbocharged?
Yes, the Audi CZAC is turbocharged (Bi-Turbo + EAV).
Does the Audi CZAC need valve clearance adjustment?
No, the Audi CZAC has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Audi CZAC last?
The typical lifespan of the Audi CZAC is ~300 000 km with proper maintenance.
What is the fuel consumption of the Audi CZAC?
Audi SQ7 TDI 2017: city 10.7, highway 7.5, combined 8.7 L/100 km.
What cars was the Audi CZAC installed on?
Audi SQ7 2 (4M) in 2016 - 2020; Bentley Bentayga 1 (4V) in 2017 - 2019.
What are the common problems of the Audi CZAC?
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. All known problems.
