Audi S4: When Did Turbocharging Start?

The Audi S4, a performance-oriented version of the Audi A4, has a rich history of combining luxury with spirited driving dynamics. A key element in achieving this performance has been the use of turbocharging. So, when did Audi introduce turbocharging to the S4? Let's dive into the history of the Audi S4 to pinpoint the year it first received a turbocharged engine.

The First Generation Audi S4 (1991-1994): A Turbocharged Pioneer

The original Audi S4, produced from 1991 to 1994, was indeed turbocharged. This first generation, known as the C4 chassis, featured a 2.2-liter 20-valve inline-5 cylinder turbocharged engine. This engine, designated as the AAN, produced an impressive 227 horsepower and 258 lb-ft of torque. This marked a significant step forward in combining performance with everyday usability for Audi. The turbocharger played a crucial role in delivering this power, providing a noticeable boost in acceleration and overall driving experience compared to naturally aspirated engines of the time. The inclusion of turbocharging in the very first S4 established a precedent for future models, setting the stage for Audi's continued use of forced induction in its performance vehicles. The C4 S4 was available as both a sedan and an Avant (wagon), offering practicality alongside its performance capabilities. Its Quattro all-wheel-drive system ensured excellent traction and handling, further enhancing its appeal as a capable and enjoyable sports sedan or wagon. The 2.2-liter turbocharged engine was a sophisticated piece of engineering for its time, featuring Bosch Motronic engine management and a robust design that allowed for tuning and increased power output. This made the C4 S4 a popular choice among enthusiasts who sought a combination of performance, luxury, and tunability. The legacy of the first-generation S4 lies in its pioneering use of turbocharging, which paved the way for future generations of high-performance Audi vehicles. Its combination of a powerful turbocharged engine, all-wheel drive, and available wagon body style made it a unique and desirable car for its time, and it remains a sought-after classic among Audi enthusiasts today. The C4 S4 not only showcased Audi's engineering prowess but also demonstrated the potential of turbocharging to enhance the driving experience, setting a new standard for performance sedans and wagons.

The B5 Generation Audi S4 (1997-2002): Twin Turbos Arrive

Following a brief hiatus, the Audi S4 returned in 1997 based on the B5 platform. This generation solidified the S4's reputation as a performance powerhouse. The B5 S4 was equipped with a 2.7-liter twin-turbocharged V6 engine, producing 261 horsepower and 295 lb-ft of torque. The use of two turbochargers allowed for reduced turbo lag and a broader powerband, making the car exceptionally responsive and fun to drive. The B5 S4 became an instant hit, praised for its impressive performance, refined handling, and understated styling. Its twin-turbo V6 engine was a significant upgrade over the previous generation's inline-5, offering more power and a more sophisticated driving experience. The Quattro all-wheel-drive system remained a standard feature, providing excellent traction and control in all weather conditions. The B5 S4 was available as both a sedan and an Avant, catering to different needs and preferences. Its interior was well-appointed, featuring high-quality materials and comfortable seats, making it a pleasant place to spend time whether on a spirited drive or a long road trip. The B5 S4 also gained a strong following in the aftermarket tuning community, with numerous companies offering upgrades to increase its power output and improve its handling. Its robust engine and drivetrain could handle significant increases in power, making it a popular platform for enthusiasts seeking even greater performance. The B5 S4's legacy lies in its combination of twin-turbocharged power, all-wheel drive, and understated luxury, which made it a highly desirable car for its time and continues to attract enthusiasts today. Its impact on the performance sedan market was significant, and it helped to cement Audi's reputation as a builder of high-quality, high-performance vehicles. The B5 S4 remains a beloved car among Audi fans, and its influence can still be seen in modern Audi performance models.

Subsequent Generations: Turbocharging as a Standard

After the B5 generation, turbocharging became a standard feature in all subsequent versions of the Audi S4. The B6 (2003-2005) and B7 (2005-2008) generations featured a naturally aspirated 4.2-liter V8 engine, marking a temporary departure from turbocharging. However, with the introduction of the B8 S4 in 2009, Audi returned to forced induction, utilizing a 3.0-liter supercharged V6 engine. While not technically a turbocharger, the supercharger provided similar benefits in terms of increased power and torque. The B8.5 (2013-2016) S4 continued with the supercharged V6, further refining its performance and efficiency. The current B9 generation S4, introduced in 2017, features a 3.0-liter turbocharged V6 engine, producing 349 horsepower and 369 lb-ft of torque. This latest iteration of the S4 combines cutting-edge technology with impressive performance, continuing the model's legacy as a leader in the performance sedan segment. The return to turbocharging in the B9 S4 demonstrates Audi's commitment to utilizing the latest technologies to deliver optimal performance and efficiency. The turbocharged engine provides a broad powerband and excellent throttle response, making the car exceptionally enjoyable to drive in a variety of conditions. The B9 S4 also features a range of advanced driver assistance systems and a luxurious interior, making it a well-rounded and highly desirable car. Its combination of performance, technology, and luxury makes it a strong competitor in the performance sedan market, and it continues to uphold the S4's reputation as a benchmark for its class. The B9 S4 represents the latest chapter in the S4's history, and it showcases Audi's ongoing commitment to innovation and excellence.

In Conclusion: Turbocharging from the Start

So, to answer the question directly: the Audi S4 was turbocharged from its very first iteration in 1991. The original C4 S4 featured a 2.2-liter turbocharged inline-5 engine, setting the stage for future generations. While there have been variations in engine design and forced induction methods over the years, turbocharging (or supercharging) has remained a key element in the S4's performance DNA. From the early days of the C4 to the current B9, the Audi S4 has consistently delivered a thrilling driving experience thanks to the benefits of forced induction. The S4's history is a testament to Audi's commitment to innovation and performance, and its continued use of turbocharging ensures that it will remain a leader in the performance sedan segment for years to come. Whether you're a longtime Audi enthusiast or simply looking for a fun and capable car, the S4 is a great choice that offers a blend of performance, luxury, and technology. Its turbocharged engine provides the power you need to tackle any road, and its Quattro all-wheel-drive system ensures that you'll stay in control no matter the weather. The Audi S4 is a true icon of the performance sedan world, and its legacy is sure to continue for many years to come. The commitment to turbocharging from the start has helped the Audi S4 to create a lasting legacy.