DOC #CERT-C86D-F35F-814E
07.09.2026
Performance Report
ECU Chiptuning — Stage 1
Document Date
07.09.2026
Audi A8
D4 - 2010 - 2016 4.0 TFSI 420hp Petrol
Original
420HP
600 Nm
Stage 1
540HP
800 Nm
+120 HP / +29% +200 Nm / +33%
Estimated Power and Torque Curve
Customer
Chassis
Date
Signature
Stamp
NOTICE: This document represents estimated values based on database information. It is not valid as official certification without the original handwritten signature and physical stamp of the authorized technician. Performance values may vary based on vehicle condition, fuel quality and operating environment.