Product Information. VF-Engineering chose to supercharge the Audi S4 4.2 liter to provide a blistering launch from a standstill with a water cooled roots type Eaton TVS1900 supercharger. VF Engineers knew that only a roots type supercharger would give a torque increase needed to satisfy the hungriest enthusiast.
Given Audi’s heritage with turbocharging its performance models, the choice of a supercharger for the 2009 S4 and its S5 Sportback and It 5.4-litre V8 used a supercharger to offer 516lb ft
PES supercharger kits for 4.2 A6, A8, AR and S6 vehicles. It may be time to buy a V8 Allroad or S6 and just throw a supercharger on it. Much easier than my plan to stuff a 4.2tt in one of those. wow thats in increadible deal$8500 for 30-40% more power2-15-23 UPDATE! NEW BEST OF 10.85 @ 127.91 MPH with our R15 R Series Clutch Pack upgrade here -wv4Q.