Audi A4 · Engine family · 4 offered

Audi A4 1.8L four-cylinder

The 1.8T is the most common engine code the VIN decodes to on the 1.8L four-cylinder configurations below; hybrid variants of the same displacement carry their own code. Rated at 150–170 hp. We decode it on 8,356 VINs across 31 factory builds, and 38 of those cars are on sale today at a typical $5,990.

Cylinders
4
Power
150–170 hp
Induction
Naturally aspirated
Fuel
Gasoline
Fitted
1997–2006

◷ Updated September 2, 2026 ▤ National asking prices, refreshed nightly

$5,990
Typical asking price, cars with this engine
38
On sale today with the 1.8L 4-cyl
1997–2006
Model years it was fitted
31
Factory configurations
8,356
A4 VINs decoded with it

Where the 1.8L 4-cyl sits in the A4 engine lineup

Every engine family this model was sold with, ordered by size. The bar spans the model years it was fitted; the price is what cars carrying it ask today. Older engines look cheaper because the cars are older — the only fair comparison is an engine whose years overlap this one's.

1.8L 4-cyl this page
1997–2006
$5,990
150–170 hp · 38 on sale
2.0L 4-cyl turbo
2005–2025
$9,980
188–261 hp · 3,084 on sale
3.0L 6-cyl
2002–2006
$5,995
220 hp · 41 on sale
3.1L 6-cyl
2005–2009
$7,695
255 hp · 28 on sale

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 1.8L 4-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.

Year Share of VINs VINs On sale Builds
2006 811 9 2 2005 1,786 14 5 2004 2,042 8 4 2003 1,601 4 4
2002 917 — 3
2001 540 2 3
2000 220 — 4
1999 256 1 3
1998 126 — 2
1997 57 — 1

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.

31 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.

2006

1 build
2006 A4 1.8 Cabriolet wauac48h Convertible · 170 hp

2005

4 builds
2005 A4 S Line waubc48h Convertible · 170 hp 2005 A4 base waujc68e Sedan · 170 hp 2005 A4 base wauac48h Convertible · 170 hp 2005 A4 Quattro waulc68e Sedan · 170 hp

2004

2 builds
2004 A4 Quattro waulc68e Sedan · 170 hp 2004 A4 Quattro wauac48h Convertible · 170 hp

2003

3 builds
2003 A4 1.8T waujc68e Sedan · 170 hp 2003 A4 1.8 Cabriolet wauac48h Convertible · 170 hp 2003 A4 Quattro wauvc68e 170 hp

2002

2 builds
2002 A4 1.8T waujc68e Sedan · 170 hp 2002 A4 Quattro wauvc68e 170 hp

2001

3 builds
2001 A4 base wauac68d Sedan · 170 hp 2001 A4 Quattro waukc68d 170 hp 2001 A4 Quattro waudc68d Sedan · 170 hp

2000

4 builds
2000 A4 Quattro waukc28d 150 hp 2000 A4 Quattro waudc28d Sedan · 150 hp 2000 A4 Quattro waudc68d Sedan · 150 hp 2000 A4 base wauac28d Sedan · 150 hp

1999

3 builds
1999 A4 Quattro waucb28d Sedan · 150 hp 1999 A4 base waubb28d Sedan · 150 hp 1999 A4 Quattro waugb28d 150 hp

1998

2 builds
1998 A4 Quattro waucb28d Sedan · 150 hp 1998 A4 1.8T waubb28d Sedan · 150 hp

Showing the 24 most-built configurations of 31. Every 2006 A4 build →

The 1.8L 4-cyl A4: common questions

Which A4 years have the 1.8L 4-cyl?

1997–2006, without a break — 10 model years in our VIN decode, across 31 factory configurations and 8,356 VINs.

What does a 1.8L 4-cyl A4 cost?

$5,990 is the typical asking price across the 38 cars with this engine on sale today. The year-by-year ladder above splits that by model year — the spread between the oldest and newest year is far wider than the spread between engines.

What is the engine code, and does it matter?

1.8T — 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.

1.8L 4-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.