As far as a price for the rebuild, I find that the $9.5k quote is excessive. I honestly would have had another engine installed and fooled around with the concept of having the second one built/optimized. 03-05-2009 10:19 AM #18. Monchichi8. Mazhar replaced the RS4’s twin-turbo 2.7 L V6 with a twin-turbo 4.2 L Audi 32v V8 (1st gen S6). The V8 makes 1,065 hp and 1,248 Nm (920 lb-ft) to all four wheels thanks to E100 race fuel and twin Owen Developments GTB turbochargers making 2 bar (29 psi) of boost. He estimates the engine is making about 1,330 hp and 1,562 Nm (1152 lb-ft) of Audi made a high-performance, 4.2-litre V8 engine (parts code prefix: 077, identification code: AEC) with a Bosch KE-Motronic ECU available as an option in the original European S4s, and made the decision to continue to do so with the S6, making a 213 kW (290 PS; 286 bhp) version of the 4.2 available as an optional upgrade over the 2.2-litre Save money on one of 17 used Audi RS 4s near you. 2007 Audi RS 4 Quattro Sedan 4D V8 4.2 Liter Manual 6-Spd Quattro AWD Clean Title Rust Free* 30 DAY POWERTRAIN WARRANTY * INCLUDED @ ASKING Flow diagrams are so readily available for 1.8t's and 2.0t's. As I learn more about how everything functions on the 4.2, my aim will be improving/deleting. Starting with the flapper hose and following it all back as much as possible. Several of the mini hoses are ready to crack, so tackling it all at once is the plan. For sale: pvw feature 2000 a4 w/s6 v8 swap. B8 a4 with a 4.2 s5 v8 swapSwap audi a4 v8 Audi twin v8 turbo rs4 engine swap s4 b7 a4 choose boardB5 audi a4, vr6 swap — nubworks. Audi a4 b5 v8 swapS4 v10 Twin-engine audi s4 wagon with 2000 hp goal in 2020Engine is in and it fits!!!. Check Details. The S8 is powered by a twin-turbo 4.0-liter V8 that produces 563 horsepower that can push it to an electronically limited top speed of 155 mph and can accelerate from 0 to 62 mph in just 3.7 seconds. All this power comes with the luxury of the interiors and the comfort that only an Audi knows how to offer. Dyno results for affected cars seem to be anywhere up to 40hp below quoted stock HP on the 4.2 V8 FSI engine. Solutions To remove build-up, only a manual physical cleaning of the intake valves and vanes has shown to be able to completely remove the carbon of which Audi will not warrant unless there are continual misfires occuring. o88g3wS.