Bring new life to Audi’s high-revving 4.2L naturally aspirated V8 with our Stage 1 ECU calibration. Designed specifically for 93 octane fuel, this tune sharpens throttle response, improves mid-range torque, and delivers measurable horsepower gains while preserving the linear, high-RPM character that makes the RS5 so engaging to drive.

• Power Gains: +19 HP / +14 TQ

• Final Output: 469 HP / 331 lb-ft TQ

• Fuel Requirement: 93 Octane

• Hardware Requirements: None (compatible with stock intake & exhaust)

• Installation: Must be flashed at a Tunezilla dealer

Why Choose TuneZilla?

At TuneZilla, we strive for an OEM level of drivability and reliability. Our team of calibrators from around the world painstakingly work to deliver repeatable performance on all of our base maps.

One of the biggest differences between our tunes and many competitors’ is our linear, OEM-like throttle response. Some software tuners artificially increase throttle sensitivity to give a peaky feeling under acceleration, masking a weaker torque curve. In contrast, our calibrations are designed to provide the most usable and consistent power curve possible — maintaining a strong pull without torque falling off midway through the rev range.

By generating peak power as early as possible while keeping the torque curve strong throughout, our tunes not only achieve an attractive top-end number but also deliver a wider, more enjoyable powerband that translates to real-world performance you can feel every time you drive.