Overview
The Audi A4 B8, produced between 2008 and 2016, represents the third generation of the A4 series. Among the range of engines offered, the CDN engine is a 2.0-liter TDI (Turbocharged Direct Injection) diesel powerplant known for its balance of efficiency, performance, and reliability. This engine is part of the EA189 family of diesel engines, which was widely used in Volkswagen Group vehicles during this era.
Engine Specifications
The CDN engine features a displacement of 1,968 cc, with a turbocharged inline-four cylinder configuration. It utilizes a common rail fuel injection system, capable of delivering precise fuel metering at high pressure, improving both combustion efficiency and power output. The turbocharger is designed to provide immediate response and minimize turbo lag, offering a smooth driving experience across a wide range of RPMs.
Power output for the CDN engine typically ranges from 140 to 143 horsepower (104–105 kW) and produces 320 Nm of torque. This torque is available at relatively low engine speeds, which makes it particularly effective for everyday driving as well as highway cruising, allowing the A4 B8 to accelerate confidently without excessive fuel consumption.
Performance and Efficiency
One of the hallmarks of the CDN engine is its fuel efficiency. Diesel engines naturally provide higher energy density per liter of fuel compared to gasoline engines, and the CDN leverages this with advanced turbocharging and direct injection technology. Typical fuel economy for an Audi A4 B8 with the CDN engine ranges between 5.0 to 5.5 liters per 100 km under mixed driving conditions, making it an attractive option for those looking for a balance of performance and economy.
The engine is paired with either a 6-speed manual or CVT/automatic transmission, offering smooth gear transitions and enhancing drivability. Its turbocharged nature ensures responsive overtaking and comfortable cruising even at lower engine speeds.
Reliability and Maintenance
The CDN engine is generally regarded as reliable, though like all diesel engines of its era, it requires regular maintenance to sustain longevity. Key maintenance considerations include monitoring the DPF (Diesel Particulate Filter), EGR (Exhaust Gas Recirculation) system, and performing timely oil changes with high-quality synthetic oil. When maintained properly, these engines can exceed 300,000 kilometers without major issues.
Conclusion
In summary, the Audi A4 B8 CDN engine is a robust, efficient, and practical diesel option for mid-size luxury sedan enthusiasts. It offers a harmonious mix of torque-rich performance, fuel efficiency, and long-term reliability, making it a strong choice for daily commuting, long-distance travel, and drivers who appreciate refined German engineering in a compact executive car.