APR officially launches their 4.0 TFSI V8 tune upgrade with ECU map switching for the Audi S6 and S7 - 91, 93, and 100 octane map dynos

Well here it finally officially is, the APR 4.0 TFSI Audi twin turbo V8 tune. APR teased this upgrade with some great content including before and after drag strip results as well as a speedometer before and after tune overlay. Suffice it to say the tune makes a noticeable difference and on pump gas gets the car practically into the mid 11's in the 1/4 mile tune only. Now we have the full overlay of maps, dyno graphs, and pricing.

Let's start with 91 octane results. The baseline is 403 horsepower at all four wheels and after the tune this increases 465 all wheel horsepower tune only for a gain of 62 horsepower at all four wheels. Torque goes up quite a large amount from 431 pound-feet at all four wheels to 524 pound-feet at all four wheels making for just under 100 pound-feet gained. Impressive.


The baseline provided for 93 octane is the same as 91 octane which makes AudiBoost wonder if APR just used the same 91 octane baseline for both. The torque baseline is the same as well and the 93 octane numbers should not be the exact same although they should be close. Regardless, wheel horsepower increases by 75 wheel horsepower on 93 octane to 478 wheel horsepower and torque goes to 536 pound-feet to the wheels for a gain of 105 pound-feet at the wheels.


APR's website has a mistake on it with no 100 octane wheel horsepower graph. Hopefully this is addressed so we can see the wheel figures.

Edit: After peeking into the source code on APR's page AudiBoost was able to locate the 100 octane dyno. Just under 100 wheel horsepower gained as previously teased for a peak of 490 at all four wheels. The torque gain is an astounding 124 pound-feet to the wheels.


Here are the 60-130 and 1/4 mile figures. As previously stated, the tune on pump will get one close to mid 11's. On race gas, one can expect to be in the mid to low 11's without even touching the exhaust system:


There are also valet, anti-theft, code deletion, and stock modes for dealer visits. This is very well done high quality software. Pricing is a reasonable $1500. Great work as usual APR.