Audi S8 IV (D5) Owners’ Blog
Audi S8 IV (D5) Owners’ Blog
- Audi S8 IV (D5)
Tuning
Audi S8 — Stage 1 ECU & TCU Upgrade
This 2023 Audi S8 received a combined Stage 1 ECU and AL552 TCU upgrade focused on increasing power, improving throttle response, and enhancing transmission performance. Factory output of 571 hp and 800 Nm was increased to 670 hp and 960 Nm, delivering noticeably stronger acceleration and a significantly more aggressive driving character. The AL552
