Description
Audi A4 / A6 2.4 V6 APS / ACK / AAH Engine
The APS (2.4L), ACK (2.8L), and AAH (2.8L) engine codes belong to a family of naturally aspirated V6 petrol engines used in various Audi A4 and A6 models during the 1990s and early 2000s. Since these are older engines, finding a used replacement is the most common option.Â
Engine code specifications
- APS (2.4L V6):Â Used in the Audi A6 (C5 chassis) from approximately 1998 onwards.
- ACK (2.8L V6 30V):Â This 30-valve (5 valves per cylinder) V6 was used in the Audi A4 (B5 chassis) and Audi A6 (C5 chassis). It offered more power than the earlier AAH engine.
- AAH (2.8L V6 12V):Â The older 12-valve AAH engine was used in the Audi A4 (B5 chassis) and earlier A6 models.Â







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