2020-2021 Audi S8 (D5) 4.0 TFSI V8 (571 Hp) Mild Hybrid quattro tiptronic COD

The Audi S8 (D5) 4.0 TFSI V8, produced from 2020 to 2021, represents the pinnacle of performance and luxury within the fourth generation (D5) of Audi’s flagship sedan. Positioned as the high-performance variant of the A8, the S8 D5 distinguishes itself with a potent twin-turbocharged V8 engine, a sophisticated mild-hybrid system, and Audi’s renowned quattro all-wheel-drive. This iteration of the S8 aimed to blend exhilarating performance with the refined comfort expected of a luxury saloon, competing directly with vehicles like the BMW 7 Series and Mercedes-Benz S-Class in the ultra-luxury performance segment. It sits at the top of the A8 range, offering significantly more power and a sportier driving experience than the standard A8 models.

Technical Specifications

Powertrain & Engine Architecture

The heart of the S8 D5 is the 4.0 TFSI V8 engine, designated as the CWWB code. This engine is a twin-turbocharged, direct-injection powerplant producing 571 horsepower at 6000 rpm and a substantial 800 Nm (590 lb-ft) of torque available from 2000 to 4500 rpm. The engine incorporates Audi’s Cylinder on Demand (COD) technology, a mild-hybrid system that deactivates cylinders under light load conditions to improve fuel efficiency. This system, coupled with an 48V electrical system, contributes to a smoother driving experience and reduced emissions. The engine’s direct injection system ensures precise fuel delivery, while the twin-turbochargers provide instant throttle response and a broad powerband. The engine is longitudinally mounted at the front of the vehicle. The transmission is an 8-speed tiptronic automatic, specifically tuned for the S8’s performance characteristics. This transmission offers smooth and rapid gear changes, enhancing both acceleration and cruising comfort.

Driving Characteristics

The S8 D5 delivers a driving experience that is both exhilarating and refined. The combination of the powerful V8 engine, the quick-shifting tiptronic transmission, and the quattro all-wheel-drive system results in impressive acceleration – 0 to 60 mph in approximately 3.6 seconds. The quattro system provides exceptional traction in all weather conditions, inspiring confidence during spirited driving. While the S8 is undeniably fast, it doesn’t sacrifice comfort. The adaptive air suspension, standard on the S8, provides a smooth and controlled ride, even on uneven surfaces. The steering is precise and well-weighted, offering a connected feel to the road. Compared to the standard A8, the S8’s suspension is firmer and the steering is more responsive, providing a more engaging driving experience. Compared to other high-performance sedans, the S8 prioritizes comfort and refinement alongside outright speed.

Equipment & Trim Levels

The S8 D5 came generously equipped as standard. Interior features included Valcona leather upholstery, heated and ventilated front seats with massage function, a panoramic sunroof, and a premium Bang & Olufsen sound system. The dashboard featured Audi’s MMI touch response system, with dual touchscreens controlling infotainment and vehicle settings. Standard safety features included adaptive cruise control, lane keeping assist, and a 360-degree camera system. Optional extras included rear-seat entertainment, a night vision assistant, and various customization options for interior trim and exterior styling. The S8 trim level was the highest available, offering a more luxurious and feature-rich experience than the standard A8 models.

Chassis & Braking

The S8 D5 features an independent multi-link suspension at both the front and rear, optimized for performance and comfort. The adaptive air suspension allows the driver to adjust the ride height and damping characteristics. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. The front brakes are larger in diameter than those on the standard A8, further enhancing braking performance. Audi’s ABS (Anti-lock Braking System) and Electronic Stability Control (ESC) are standard features, providing added safety and control.

Market Reception & Comparison

The Audi S8 D5 was generally well-received by automotive critics. It was praised for its powerful engine, luxurious interior, and refined driving experience. However, some critics noted that its fuel economy was relatively poor, and its price was high. Compared to other trims in the A8 lineup, the S8 offered significantly more performance and a more exclusive driving experience. The S8’s mild-hybrid system helped to improve fuel economy compared to previous generations, but it still lagged behind some of its competitors. Its main rivals, the BMW 7 Series and Mercedes-Benz S-Class, offered similar levels of performance and luxury, but the S8 distinguished itself with its quattro all-wheel-drive system and its advanced technology features.

Legacy

The S8 D5, despite its short production run, represents a high point in Audi’s performance sedan lineage. The 4.0 TFSI V8 engine, while complex, has proven to be relatively reliable when properly maintained. The mild-hybrid system, while innovative, has not been without its share of reported issues, primarily related to the 48V electrical system. On the used car market, the S8 D5 commands a premium price due to its performance, luxury, and exclusivity. Regular maintenance, including oil changes and inspections of the 48V system, is crucial for ensuring the long-term reliability of this vehicle. The S8 D5 remains a desirable choice for enthusiasts seeking a high-performance luxury sedan with a blend of power, comfort, and technology.