Audi S4 (B9)

27 sales analyzed · 3 topics from real Bring a Trailer & Cars & Bids comments.

The B9 S4 (2018+) moved from the B8's supercharger to a single turbocharged 3.0L V6 (~349 hp) with an 8-speed automatic. It's the modern S4 — fast, comfortable, all-weather, and a discreet daily — and the auction community treats it largely as a current used car rather than an enthusiast collectible yet, so the comment record is thin and skews to spec/ownership chatter and tuned examples (the turbo responds very well to a tune). …

“this car has been my favorite daily driver ever.”Rideoldiron · Sep 15, 2025

The modern S4: turbocharged, fast, comfortable dailycommunity-sentiment
The B9 swapped the supercharger for a single-turbo 3.0T and pairs it with an 8-speed auto and quattro. Owners describe it as quick, comfortable, and supremely usable year-round — a discreet, do-everything daily rather than a weekend toy. …
Responds well to a tune; check stock vs. modifieddrivetrain
The turbo 3.0T takes well to tuning (stage tunes, and on built cars larger turbos and ethanol flashes add big power), so a meaningful share of B9s on the market are modified. Confirm exactly what's been done and whether the ECU/TCU are stock if you want a factory car or a documented build. …
Thin community track record so farbuying-advice
Because the B9 is still recent, trustworthy long-term ownership data is comparatively scarce in the threads — prospective buyers explicitly say good ownership content is hard to find. Lean on service records and a PPI rather than community consensus, which hasn't fully formed. …