The 4.0-liter twin-turbo V8 Audi DWNB has been produced since 2024 and is installed on the Audi RS Q8. It has direct injection and two turbochargers (BorgWarner B03G) and produces 600 hp and 800 Nm. It works with a mild hybrid system.
EA825 family: CXYA, DCUE, DJPB, DWKA, DWLA, DWNA, DWNB, DWPA, DYGA, DYGB.
Specifications
| Production years | since 2024 |
| Displacement, cc | 3996 |
| Fuel system | direct injection |
| Power output, hp | 600 |
| Torque output, Nm | 800 |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 86 |
| Piston stroke, mm | 86 |
| Compression ratio | 9.7 |
| Features | AVS, MHEV |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | at intake and exhaust |
| Turbocharging | two BorgWarner B03G |
| Recommended engine oil | 0W-40 |
| Engine oil capacity, liter | 9.5 |
| Fuel type | petrol |
| Euro standards | EURO 6e |
| Fuel consumption, L/100 km (for Audi RS Q8 2025) — city — highway — combined |
17.5 9.3 12.1 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 231 |
The engine was installed on:
- Audi RS Q8 1 (4M) since 2024.
Disadvantages of the Audi DWNB engine
- A fairly reliable engine unless it has been tuned;
- Watch fuel quality: there are already cases of pistons destroyed by detonation, and the plasma-sprayed cylinder walls suffer from bad petrol;
- Change the oil as often as possible: turbocharger life depends heavily on it;
- Components of the 48-volt mild hybrid system cause a lot of trouble.
Frequently asked questions about the Audi DWNB
How much power does the Audi DWNB make?
The Audi DWNB develops 600 hp and 800 Nm of torque.
How much oil does the Audi DWNB take and which one?
Engine oil capacity: 9.5 liters. Recommended oil: 0W-40.
Does the Audi DWNB have a timing belt or chain?
The Audi DWNB uses a timing chain.
Is the Audi DWNB turbocharged?
Yes, the Audi DWNB is turbocharged (two BorgWarner B03G).
Does the Audi DWNB need valve clearance adjustment?
No, the Audi DWNB has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Audi DWNB last?
The typical lifespan of the Audi DWNB is ~300 000 km with proper maintenance.
What is the fuel consumption of the Audi DWNB?
Audi RS Q8 2025: city 17.5, highway 9.3, combined 12.1 L/100 km.
What cars was the Audi DWNB installed on?
Audi RS Q8 1 (4M) since 2024.
What are the common problems of the Audi DWNB?
A fairly reliable engine unless it has been tuned. Watch fuel quality: there are already cases of pistons destroyed by detonation, and the plasma-sprayed cylinder walls suffer from bad petrol. All known problems.
