The Audi A6 Sedan (C8) 45 TFSI, produced from 2020 to May 2023, represents a significant iteration of Audi’s mid-size executive car. This variant, equipped with a 2.0-liter turbocharged four-cylinder engine producing 265 horsepower and incorporating mild hybrid technology, occupied a key position in the C8 A6 lineup, offering a balance between performance, efficiency, and technology. It was positioned as a step up from the base 40 TFSI model, appealing to buyers seeking more power without the expense of the higher-performance 50 TFSI or S6 trims. The “ultra” designation indicates Audi’s quattro all-wheel drive system optimized for efficiency, dynamically adjusting power distribution between the front and rear axles.
Technical Specifications
| Brand | Audi |
| Model | A6 |
| Generation | A6 Sedan (C8) |
| Type (Engine) | 45 TFSI (265 Hp) Mild Hybrid quattro ultra S tronic |
| Start of production | 2020 |
| End of production | May, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 7.3-8.2 l/100 km (32.2 – 28.7 US mpg) |
| CO2 emissions (WLTP) | 165-186 g/km |
| Fuel consumption (urban) | 8.8-9 l/100 km (26.7 – 26.1 US mpg) |
| Fuel consumption (extra urban) | 5.5-5.9 l/100 km (42.8 – 39.9 US mpg) |
| Fuel consumption (combined) | 6.7-7 l/100 km (35.1 – 33.6 US mpg) |
| CO2 emissions (NEDC) | 154-161 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6 sec |
| Acceleration 0 – 62 mph | 6 sec |
| Acceleration 0 – 60 mph | 5.7 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro-6d-ISC-FCM |
| Weight-to-power ratio | 6.4 kg/Hp |
| Weight-to-torque ratio | 4.6 kg/Nm |
| Power | 265 Hp @ 5250-6500 rpm |
| Torque | 370 Nm @ 1600-4300 rpm (272.9 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | DMTA, DPAA |
| Engine displacement | 1984 cm3 (121.07 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82.5 mm (3.25 in.) |
| Piston Stroke | 92.8 mm (3.65 in.) |
| Compression ratio | 9.6:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.2 l (5.49 US qt | 4.58 UK qt) |
| Coolant capacity | 8.7 l (9.19 US qt | 7.65 UK qt) |
| Kerb Weight | 1705 kg (3758.88 lbs.) |
| Max. weight | 2340 kg (5158.82 lbs.) |
| Max load | 635 kg (1399.94 lbs.) |
| Trunk (boot) space | 530 l (18.72 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| Max. roof load | 90 kg (198.42 lbs.) |
| Permitted trailer load (brakes 8%) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load (brakes 12%) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load (no brakes) | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 95 kg (209.44 lbs.) |
| Length | 4939 mm (194.45 in.) |
| Width | 1886 mm (74.25 in.) |
| Width including mirrors | 2110 mm (83.07 in.) |
| Height | 1457 mm (57.36 in.) |
| Wheelbase | 2924 mm (115.12 in.) |
| Front track | 1630 mm (64.17 in.) |
| Rear track | 1617 mm (63.66 in.) |
| Drag coefficient (Cd) | 0.27 |
| Minimum turning circle | 12.1 m (39.7 ft.) |
| Drivetrain Architecture | ICE and electric motor drive front wheels, rear drive via clutch |
| Drive wheel | All wheel drive (4×4) |
| Number of gears | 7 |
| Gearbox type | Automatic transmission S tronic |
| Front suspension | Independent multi-link |
| Rear suspension | Independent multi-link |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
Powertrain & Engine Architecture
At the heart of the A6 45 TFSI lies the EA888 2.0-liter inline-four cylinder engine, specifically coded DMTA or DPAA depending on the production year and market. This engine utilizes direct fuel injection and a single twin-scroll turbocharger with an intercooler to deliver a robust 265 horsepower and 272.9 lb.-ft. of torque. The engine’s design emphasizes both power density and thermal efficiency. The mild hybrid system, a 48-volt electrical system, incorporates a belt starter generator (BSG) and a small lithium-ion battery. This system allows for extended start-stop operation, regenerative braking, and a slight power boost during acceleration. The seven-speed S tronic dual-clutch transmission provides quick and smooth gear changes, contributing to the car’s responsive driving experience. The transmission is known for its efficiency and ability to handle the engine’s torque output effectively.
Driving Characteristics
The A6 45 TFSI Automatic offers a refined and comfortable driving experience. The 265 hp engine provides ample power for everyday driving and confident highway passing. Acceleration from 0 to 60 mph takes approximately 5.7 seconds. The S tronic transmission contributes to seamless gear changes, and the quattro all-wheel-drive system provides excellent traction in various weather conditions. Compared to the base 40 TFSI, the 45 TFSI offers a noticeable performance improvement. While not as sporty as the 50 TFSI, it strikes a good balance between performance and fuel economy. The gear ratios are tuned for a blend of acceleration and efficiency, with taller gears for relaxed cruising. The mild hybrid system is largely transparent to the driver, providing subtle assistance during acceleration and improving fuel economy.
Equipment & Trim Levels
The A6 45 TFSI typically came well-equipped as standard. Features included Audi’s Virtual Cockpit digital instrument cluster, a 10.1-inch touchscreen infotainment system with Apple CarPlay and Android Auto, leather upholstery, three-zone automatic climate control, and a suite of driver-assistance systems such as lane departure warning and automatic emergency braking. Optional extras included a premium sound system, adaptive cruise control, a head-up display, and various interior trim upgrades. Trim levels varied by market, but generally offered packages that added features like navigation, parking assistance, and upgraded wheels.
Chassis & Braking
The C8 A6 utilizes a sophisticated chassis design featuring independent multi-link suspension at both the front and rear. This setup provides a comfortable ride while maintaining good handling characteristics. The quattro all-wheel-drive system contributes to stability and traction. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The electronic stability control (ESC) system works in conjunction with the all-wheel-drive system to enhance safety and control. The suspension tuning is geared towards comfort, but the car remains composed and predictable in corners.
Market Reception & Comparison
The Audi A6 45 TFSI was generally well-received by automotive critics. It was praised for its refined driving experience, comfortable interior, and advanced technology. Compared to its rivals, such as the BMW 5 Series and Mercedes-Benz E-Class, the A6 45 TFSI offered a compelling combination of features and performance. Fuel economy was considered competitive for its class, with the mild hybrid system contributing to improved efficiency. Reliability reports have been generally positive, although some owners have reported minor issues with the infotainment system. Compared to the 40 TFSI, the 45 TFSI offered a worthwhile performance upgrade for a moderate price increase.
Legacy
The Audi A6 C8 45 TFSI represents a well-rounded and technologically advanced executive sedan. The EA888 engine, coupled with the S tronic transmission and quattro all-wheel drive, has proven to be a reliable and durable powertrain. On the used car market, these models hold their value reasonably well, reflecting their reputation for quality and refinement. The mild hybrid technology, while not a full hybrid system, demonstrates Audi’s commitment to improving fuel efficiency and reducing emissions. The C8 A6 45 TFSI remains a desirable option for buyers seeking a comfortable, capable, and technologically advanced mid-size sedan.
