The 4.2-liter Audi CDRA or A8 4.2 FSI engine was produced by the concern from 2009 to 2012 and was installed only on the popular A8 sedan in the D4 body before its restyling. A similar motor on the second generation of the Touareg crossover has its own CGNA index.
3.7-4.2 V8 EA824 family: AEW, ABZ, BFL, BFM, AXQ, BVJ, CDRA, BAR.
Specifications
| Production years | 2009-2012 |
| Displacement, cc | 4163 |
| Fuel system | direct injection |
| Power output, hp | 372 |
| Torque output, Nm | 445 |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 84.5 |
| Piston stroke, mm | 92.8 |
| Compression ratio | 12.5 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | on all shafts |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.7 |
| Fuel type | petrol |
| Euro standards | EURO 5 |
| Fuel consumption, L/100 km (for Audi A8 2011) — city — highway — combined |
13.6 7.4 9.7 |
| Engine lifespan, km | ~270 000 |
| Weight, kg | 198 |
The engine was installed on:
- Audi A8 D4 (4H) in 2009 – 2012.
Disadvantages of the Audi CDRA engine
- Saving on the quality of fuel and oils here often leads to the formation of scoring;
- Many engine problems are related to coking due to the direct injection system;
- Around 200,000 km, timing chains can already stretch, and replacing them is difficult and expensive;
- The plastic intake manifold often cracks and loses its tightness;
- Another weak point of this motor is the oil separator and ignition coils.
Frequently asked questions about the Audi CDRA
How much power does the Audi CDRA make?
The Audi CDRA develops 372 hp and 445 Nm of torque.
How much oil does the Audi CDRA take and which one?
Engine oil capacity: 7.7 liters. Recommended oil: 5W-30.
Does the Audi CDRA have a timing belt or chain?
The Audi CDRA uses a timing chain.
Is the Audi CDRA turbocharged?
No, the Audi CDRA is naturally aspirated.
Does the Audi CDRA need valve clearance adjustment?
No, the Audi CDRA has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Audi CDRA last?
The typical lifespan of the Audi CDRA is ~270 000 km with proper maintenance.
What is the fuel consumption of the Audi CDRA?
Audi A8 2011: city 13.6, highway 7.4, combined 9.7 L/100 km.
What cars was the Audi CDRA installed on?
Audi A8 D4 (4H) in 2009 - 2012.
What are the common problems of the Audi CDRA?
Saving on the quality of fuel and oils here often leads to the formation of scoring. Many engine problems are related to coking due to the direct injection system. All known problems.
