✦ Shifty Estimate
$14,900
▲ 36.1% · 12 mo- 12 months median
- $13K
- Sales, 12 months
- 7
- Original MSRP
- $54,900 · ▼ 73% since
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2006 Audi S4
2006 to 2008 · Sedan
Price history
Recent sales
More sales on file
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Specifications
- Engine
- V8, 4.2L
- Power
- 340 hp
- Torque
- 302 lb-ft
- 0 to 60
- 5.1s
- Top speed
- 155 mph
- Transmission
- Manual
- Drivetrain
- AWD
- Original MSRP
- $54,900
Common questions
How much does a Audi S4 cost?
A 2006 Audi S4 cost $54,900 new. Over the past 12 months, 7 have sold publicly at a median of $12,500. The Shifty Estimate for a well-kept example is $14,900. Cars have changed hands anywhere from $5,800 to $20,000, depending on mileage, color, and history.
What is a 2006 Audi S4 worth today?
The Shifty Estimate is $14,900, up 36.1% over the past 12 months. That sits above the $12,500 median of actual sales because the median counts every car that sold, including high-mileage examples, while the estimate describes a clean, low-mileage one bought today. Confidence is high: 7 public sales in a year gives a firm read.
Is a Audi S4 a good investment?
It has depreciated 73% against its $54,900 list price. Values are up 36.1% over the past 12 months. The caution is spread, not direction: across the sales we have on file, prices ran from $5,850 to $77,000, and mileage explains most of that.
What has a Audi S4 sold for at auction?
The 3 most recent public sales we have on file:
- $77,000Jul 29, 2026Ibis White · 3,700 mi
- $17,250Apr 1, 2026Light Silver Metallic (LY7W) · 132,000 mi
- $8,200Feb 4, 2026Dolphin Gray Metallic · 147,500 mi
The B7-generation S4 represents Audi's last naturally aspirated V8 S4, making it increasingly coveted among enthusiasts who prize linear power delivery over turbo lag. Its 4.2-liter V8 produces 344 horsepower and that intoxicating high-rpm wail that disappeared when Audi switched to supercharged V6s. Built on the same platform as the RS4, it shares much of the suspension DNA while offering more daily usability. The Avant wagon variant is particularly sought-after, combining 155mph capability with genuine practicality. These cars have aged gracefully, with their understated flared fenders and subtle aggression looking more purposeful than flashy modern performance sedans. Carbon build-up on intake valves remains the primary concern, but well-maintained examples are appreciating as collectors recognize this as the end of an era for Audi's naturally aspirated performance cars.