Audi A4
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Engine family
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4 offered
Audi A4 3.1L six-cylinder
The Audi is the most common engine code the VIN decodes to on the 3.1L six-cylinder configurations below; hybrid variants of the same displacement carry their own code. Rated at 255 hp. We decode it on 2,252 VINs across 20 factory builds, and 32 listings are reported active. The configuration price reference is $6,500.
- Cylinders
- 6
- Power
- 255 hp
- Induction
- Naturally aspirated
- Fuel
- Gasoline
- Fitted
- 2005–2009
- Drive
- AWD
◷ Updated October 16, 2026 ▤ National asking prices, refreshed nightly
The price reference is the median of configuration medians, not the median of all active cars. Each configuration has equal weight. Configurations with at least 3 priced listings are used when available; otherwise the reference uses the configurations with a recorded price. Model years, mileage and condition vary. Open a model-year report below for its asking prices across all engines.
Where the 3.1L 6-cyl sits in the A4 engine lineup
Every engine family this model was sold with, ordered by size. The bar spans the model years recorded for it; the price is a reference across priced configurations, with each configuration weighted equally. Older engines look cheaper because the cars are older — overlapping years alone do not match the vehicles by age, trim, mileage or condition.
4 engine families, one nameplate. Open the Audi A4 price hub to compare them side by side, or to jump into any of the others.
Which A4 years got a 3.1L 6-cyl engine
Every model year this engine was fitted to, newest first. The bar is how much of the family's VIN volume sits in that year — long bars are the years this engine was everywhere.
VIN counts come from our decode of the model's build patterns, not from live listings. A year link opens the full A4 report for that year — every engine of the model, not just this one.
20 factory configurations with this engine
Each one is a distinct build as the VIN decodes it — trim, body, gearbox and equipment. Open a build sheet for its full spec and the VINs recorded on it.
2009
1 build2008
5 builds2007
5 builds2006
6 builds2005
2 buildsShowing the 19 most-built configurations of 20. Every 2009 A4 build →
The 3.1L 6-cyl A4: common questions
Which A4 years have the 3.1L 6-cyl?
2005–2009, without a break — 5 model years in our VIN decode, across 20 factory configurations and 2,252 VINs.
What does a 3.1L 6-cyl A4 cost?
$6,500 is a configuration price reference: the median of configuration medians, with each priced configuration weighted equally. It is not a listing-level median or a valuation of an individual car. The year-by-year ladder shows VIN and inventory counts; its links open model-year price reports covering all engines.
What is the engine code, and does it matter?
Audi — the code the VIN decodes to on the configurations on this page. It matters when you order parts or read a service history: the same displacement badge on another model can be a different code with different outputs.
3.1L 6-cyl A4 on the market
Individual vehicles carrying this engine, each with its own listing-history page. The sample is pinned to fixed VIN buckets, so it does not reshuffle day to day.