The 2.3-liter Audi AAR engine was assembled at the factories of the German concern from 1990 to 1996 and was installed on the model under the index 100 in C3 – C4 bodies and the very first generation A6.
EA828 family: RT, KU, NF, NG, AAR, AAN.
Specifications
| Production years | 1990-1996 |
| Displacement, cc | 2309 |
| Fuel system | KE-III-Jetronic |
| Power output, hp | 133 |
| Torque output, Nm | 186 |
| Cylinder block | cast iron R5 |
| Block head | aluminum 10v |
| Cylinder bore, mm | 82.5 |
| Piston stroke, mm | 86.4 |
| Compression ratio | 10.0 |
| Features | SOHC |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| 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 A6 1995) — city — highway — combined |
13.2 7.6 9.3 |
| Engine lifespan, km | ~350 000 |
The engine was installed on:
Disadvantages of the Audi AAR engine
- The main engine problems are related to the vagaries of the KE-III-Jetronic injection system;
- The cause of unstable engine operation is usually air leakage or contamination of the idle valve;
- The fuel pump lasts for a relatively short time and the nozzles clog rather quickly;
- Ignition system components often fail: slider or distributor cover;
- At high mileage, hydraulic lifters often wear out and begin to knock.
Frequently asked questions about the Audi AAR
How much power does the Audi AAR make?
The Audi AAR develops 133 hp and 186 Nm of torque.
How much oil does the Audi AAR take and which one?
Engine oil capacity: 4.5 liters. Recommended oil: 5W-40.
Does the Audi AAR have a timing belt or chain?
The Audi AAR uses a timing belt.
Is the Audi AAR turbocharged?
No, the Audi AAR is naturally aspirated.
Does the Audi AAR need valve clearance adjustment?
No, the Audi AAR has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Audi AAR last?
The typical lifespan of the Audi AAR is ~350 000 km with proper maintenance.
What is the fuel consumption of the Audi AAR?
Audi A6 1995: city 13.2, highway 7.6, combined 9.3 L/100 km.
What cars was the Audi AAR installed on?
Audi 100 C3 (44) in 1990 - 1991, 100 C4 (4A) in 1990 - 1994; Audi A6 C4 (4A) in 1994 - 1996.
What are the common problems of the Audi AAR?
The main engine problems are related to the vagaries of the KE-III-Jetronic injection system. The cause of unstable engine operation is usually air leakage or contamination of the idle valve. All known problems.
