I saw in another thread the talk about the Spyker sports car and it’s V8. There was talk this V8 was from the 4.2 S4. I always like looking to see what Audi will do from one motor to another to pull more power. In the case of the spyker. It looks like they used the V8 from the S8. The spyker came out in late 2000 the same time Audi had the 360hp V8 S8 motors. Then the spyker a few years later came out with a TT version. This TT V8 looks like the same TT V8 offered in the 2003 TT V8 RS6.
The Audi non S4 V8 was made all the way till 2007. Then the change over to FSI came in.