From `2009` to `2011`, the `S4 B8` changes recipe and moves to the supercharged `3.0 TFSI`, with real ability to go very quickly without giving up day-to-day usability. Against a BMW 3 Series, it offers a very modern compromise for its time: strong performance, `quattro`, discreet presentation and genuine ease of use. On the used market it remains tempting, but it needs a clear mechanical file rather than just a good first impression on a test drive.
The core subject is the `EA837` `3.0 TFSI V6` in `CAKA` or `CCBA` form, with a `6-speed` manual or `S tronic` depending on version. The engine can be very convincing, but you need to read cooling seriously: water pump, thermostat, `PCV`, ignition, oil-service quality and the health of the supercharger system. On the transmission side, the `S tronic` and any sport differential need a proper evaluation, not just a short trip around the block.