The 2.2-liter Audi AAN 2.2 turbocharged gasoline engine was manufactured at the factory between 1991 and 1997, and it was only fitted to the S4 or S6 sports versions of the 100 model. The Audi S2 car was equipped with this power unit under an entirely different ABY index.
The EA828 series includes: RT, KU, NF, NG, AAR, AAN.
Specifications
| Production years | 1991-1997 |
| Displacement, cc | 2226 |
| Fuel system | Motronic |
| Power output, hp | 230 |
| Torque output, Nm | 350 |
| Cylinder block | cast iron R5 |
| Block head | aluminum 20v |
| Cylinder bore, mm | 81 |
| Piston stroke, mm | 86.4 |
| Compression ratio | 9.3 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | chain & belt |
| Phase regulator | no |
| Turbocharging | KKK K24 |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 4.5 |
| Fuel type | petrol |
| Euro standards | EURO 2 |
| Fuel consumption, L/100 km (for Audi S6 1996) — city — highway — combined |
14.6 7.9 10.7 |
| Engine lifespan, km | ~300 000 |
The engine was installed on:
- Audi S4 in 1991 – 1994;
- Audi S6 in 1994 – 1997.
Disadvantages of the Audi AAN engine
This turbo engine is prone to detonation; additionally, it frequently overheats; keep an eye on the radiators’ condition;
Numerous issues arise with the ignition system, particularly with coils and their tips;
Every 100,000 kilometers, the timing belt and chain are replaced; if they break, the valves will bend; the turbine and hydraulic lifters frequently malfunction on runs longer than 200,000 kilometers.