The 4.0-liter twin-turbo V8 Audi CGTA was produced from 2012 to 2013 and was installed on the Audi S8. It has direct injection and two turbochargers (IHI RHF5) and produces 520 hp and 650 Nm.
4.0 TFSI V8 EA824 family: CRDB, CEUA, CEUC, CGTA, CTFA, CTGE, CWUB, DDTA.
Specifications
| Production years | 2012-2013 |
| Displacement, cc | 3993 |
| Fuel system | direct injection |
| Power output, hp | 520 |
| Torque output, Nm | 650 |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 84.5 |
| Piston stroke, mm | 89 |
| Compression ratio | 9.3 |
| Features | AVS |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | on all shafts |
| Turbocharging | two IHI RHF5 |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 8.7 |
| Fuel type | petrol |
| Euro standards | EURO 5 |
| Fuel consumption, L/100 km (for Audi S8 2012) — city — highway — combined |
14.4 7.6 10.1 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 224 |
The engine was installed on:
- Audi S8 D4 (4H) in 2012 – 2013.
Disadvantages of the Audi CGTA engine
- With proper maintenance this twin-turbo V8 can be reliable; avoid engines after serious tuning and watch the cooling;
- Poor fuel quickly destroys the Alusil coating of the cylinders;
- Turbocharger life depends on how often the oil and their mesh filters are changed;
- Owners often complain about the high-pressure fuel pump, active engine mounts and timing chain tensioners.
Frequently asked questions about the Audi CGTA
How much power does the Audi CGTA make?
The Audi CGTA develops 520 hp and 650 Nm of torque.
How much oil does the Audi CGTA take and which one?
Engine oil capacity: 8.7 liters. Recommended oil: 5W-40.
Does the Audi CGTA have a timing belt or chain?
The Audi CGTA uses a timing chain.
Is the Audi CGTA turbocharged?
Yes, the Audi CGTA is turbocharged (two IHI RHF5).
Does the Audi CGTA need valve clearance adjustment?
No, the Audi CGTA has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Audi CGTA last?
The typical lifespan of the Audi CGTA is ~300 000 km with proper maintenance.
What is the fuel consumption of the Audi CGTA?
Audi S8 2012: city 14.4, highway 7.6, combined 10.1 L/100 km.
What cars was the Audi CGTA installed on?
Audi S8 D4 (4H) in 2012 - 2013.
What are the common problems of the Audi CGTA?
With proper maintenance this twin-turbo V8 can be reliable; avoid engines after serious tuning and watch the cooling. Poor fuel quickly destroys the Alusil coating of the cylinders. All known problems.
