Audi A6 2.0 TDI 100kW Engine (CAG) – Quiet Power and Long-Distance Diesel Efficiency
Between 2009 and 2011, Audi offered the A6 with a 2.0 TDI engine producing 100 kW (136 hp), giving drivers a fuel-efficient and dependable diesel option within the executive segment. At the heart of this version lies the trusted CAG engine—an inline-four turbo diesel known for combining solid performance with long-term reliability and low operating costs.
Balanced for Comfort and Efficiency
Audi built this version of the A6 for drivers who value smooth torque, low fuel consumption, and dependable power delivery. Whether you’re driving through city traffic, cruising on the motorway, or covering high annual mileage, the 100 kW 2.0 TDI delivers consistent performance while keeping running costs down.
The CAG Engine – A Proven Diesel Powertrain
The CAG engine belongs to the EA189 family, one of the most widely used and refined diesel platforms in Audi’s history. While slightly detuned compared to the 105 kW version, the 100 kW variant in the A6 focuses on relaxed power delivery, long service intervals, and fuel economy. Key technical features include:
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100 kW (136 hp) output
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320 Nm of torque
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Turbocharged inline-four diesel
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Common rail direct injection
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DOHC, 16-valve configuration
This engine setup makes the A6 feel capable and composed while keeping emissions and fuel usage in check.
Confident Torque for Everyday Driving
The CAG engine delivers 320 Nm of torque low in the rev range, giving you strong acceleration and flexibility without frequent gear changes. Even in a larger car like the A6, this engine moves confidently through city streets and open highways, thanks to smooth turbocharged power delivery.
Fuel Efficiency That Matches Executive Class Expectations
Audi’s engineering ensures that the 2.0 TDI achieves excellent fuel economy in real-world conditions. Many drivers report 5.0 to 6.0 L/100km, depending on driving habits and conditions. The common rail injection system ensures precise fuel metering for clean combustion, helping this A6 meet Euro 5 emissions standards.
Refined Ride with Quiet Diesel Operation
Despite being a diesel, the CAG engine in the A6 stays quiet, refined, and vibration-free. Key comfort benefits include:
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Low engine noise even under load
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Smooth, steady throttle response
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Minimal vibration at idle and while driving
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Balanced power for highway and urban use
Whether you’re covering long business trips or driving through stop-and-go traffic, the engine keeps the ride calm and comfortable.
Long Life, Low Stress – Built to Go the Distance
The CAG engine is well-known for durability. With regular maintenance, it’s common to see these engines exceed 300,000 km without major repairs. Audi designed the engine with longevity in mind, using:
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A cast-iron engine block for strength
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A robust turbo system
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Reliable fuel injection components
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Widely available parts and service support
Service and Maintenance – Key Areas to Watch
To keep the 2.0 TDI CAG engine running smoothly, pay attention to:
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Timing belt and water pump changes (around every 180,000 km)
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DPF (diesel particulate filter) cleaning or replacement after high mileage
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EGR system maintenance
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Regular oil and filter changes using VW 507.00-spec low-ash oil
Preventive service keeps fuel economy high and engine wear low.
Engine Specifications – Audi A6 2.0 TDI (2009–2011)
| Specification | Details |
|---|---|
| Engine Code | CAG |
| Engine Type | Inline-4, turbocharged diesel |
| Displacement | 2.0L (1968cc) |
| Power Output | 100 kW (136 hp) |
| Torque | 320 Nm |
| Fuel Type | Diesel |
| Injection System | Common rail direct injection |
| Turbocharged | Yes |
| Valvetrain | DOHC, 16 valves |
Compatibility and Usage
Audi used this engine in the A6 C6 generation from 2009 to 2011, particularly in front-wheel-drive configurations with manual or multitronic transmissions. You’ll also find similar 2.0 TDI CAG engines in the A4, A5, and select Volkswagen and Škoda models, making it easy to find parts and experienced service professionals.
Why Choose the 100kW 2.0 TDI for Your A6?
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Strong torque and smooth delivery for a larger vehicle
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Proven long-term reliability
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Fuel-efficient design ideal for daily driving or high mileage use
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Quiet and comfortable diesel performance
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Broad parts availability across Europe
Final Thoughts – Efficiency, Comfort, and Audi Quality
The Audi A6 2.0 TDI with the 100 kW CAG engine strikes an ideal balance between executive-class comfort and sensible diesel performance. If you’re looking for a reliable, economical, and refined vehicle for both daily use and long trips, this powertrain delivers—mile after mile.
Need a Replacement CAG Engine for Your Audi A6?
We supply thoroughly tested, road-ready used diesel engines, including the 100 kW CAG variant. Contact us for competitive pricing, fast shipping, and expert support to get your Audi back on the road with confidence.
