Audi V8 Engine Comparison.

[Nollywood]

I'm looking at the different 4,2 V8 engines used by Audi. The V8 32V, V8 40V and the chain-driven V8 40V as fitted to the B6 S4.

In terms of reliability, and extracting as much hp as possible, which would you pick? Which has the best track record?

I haven't much experience with the B6 S4 chain-driven motor, but from various fora, the chain tensioner / guides and chain are a weak point, with quite a few documented failures (US-based fora have a lot of discussions with regards this). Quite a few bust B6 S4's floating around.

The 40V fitted to D2, C5 and early D3 (non-FSI) has the VVT, which whilst making the motor more flexible, is a weak point.

The 32V fitted to D11, D2 and C4 is more basic - no VVT and single-stage variable intake manifold. And it's proven in Motorsport (I remember the V8 DTM series).

What's your take guys?