Audi RS 7 4.0L (CRDB / CWUB) TFSI Engine For Sale.

Audi RS 7 4.0L BiTurbo V8 (CRDB / CWUB) TFSI Engine.

High-performance power unit, Used efficient power engine For Sale.

The Audi RS 7 4.0L BiTurbo V8 (CRDB / CWUB) TFSI Engine is also a high-performance power unit engineered to deliver supercar-level acceleration combined with everyday drivability.

 Developed by Audi Sport, this engine represents the pinnacle of Audi’s turbocharged V8 technology, offering exceptional power, refined operation, and proven motorsport-inspired engineering. Offered here as a used engine for sale, it is ideal for factory-correct replacements, high-end restorations, or performance builds.

The CRDB and CWUB engine variants were fits to the Audi RS 6 Avant (C7) and Audi RS 7 Sportback (C7) models, produced between 2013 and 2018, depending on market specification. These engines were exclusively paired with Audi’s quattro all-wheel-drive system and moreover advanced automatic transmissions. 

Compatibility is specific to RS models designed for the 4.0L TFSI BiTurbo platform, and correct matching of ECU, turbochargers, and cooling systems is essential for optimal operation.

 Specifications, Common weaknesses and Maintenance.

From a technical standpoint, this engine is a 4.0-liter V8 petrol unit featuring Double Overhead Camshafts (DOHC) and 32 valves. It utilizes direct fuel injection (TFSI) and a twin-turbocharger setup with turbos mounted within the “hot-V” configuration for improved throttle response and reduced turbo lag. 

Power output ranges from approximately 412–441 kW (560–600 hp), depending on variant, with massive torque delivery available across a wide RPM range. The aluminum block and heads contribute to reduced weight while maintaining exceptional strength under high boost pressures.

Despite its impressive performance, the RS6/RS7 4.0L BiTurbo V8 has some common weaknesses to consider. These may include turbocharger oil strainer blockages, PCV valve failures, coolant leaks from plastic components, and ignition coil or spark plug wear due to high thermal loads. 

Carbon buildup on intake valves can also occur over time. Strict maintenance schedules, frequent oil changes using manufacturer-approved oil, and proactive inspection of turbo oil lines are critical for longevity.

Overall, the Audi RS 7 4.0L BiTurbo V8 (CRDB / CWUB) TFSI Engine delivers unmatched performance, cutting-edge engineering, and iconic RS character. When properly maintained and professionally installed, it offers extraordinary power and long-term value for serious Audi enthusiasts.