The 3.0L engine with the 5th digit VIN '4' and engine ID CTUB is a testament to Audi's commitment to performance and innovation. This supercharged V6 engine offers a perfect blend of power and efficiency, catering to drivers who demand the best from their vehicles. The CTUB engine features a sophisticated supercharger system that delivers impressive horsepower and torque, making it an ideal choice for sports-oriented vehicles. With its advanced engineering, this engine provides quick throttle response and a smooth power curve, ensuring that power is available whenever needed. The engine's design incorporates cutting-edge technologies such as direct fuel injection and variable valve timing, optimizing performance while maintaining excellent fuel efficiency. This balance of power and economy makes it a versatile choice for a wide range of driving conditions. Additionally, the engine's robust construction and precise engineering ensure reliability and durability, allowing it to perform exceptionally well over the long term. Whether navigating city streets or enjoying open-road adventures, this engine delivers a dynamic driving experience that combines power, precision, and efficiency. Its engineering excellence ensures that every drive is thrilling and engaging, providing a level of performance that meets the expectations of even the most demanding drivers.