Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 Avant (B9 8W, facelift 2019) |
| Type | 45 TFS (265 Hp) quattro ultra Mild Hybrid S tronic |
| Start of production | July, 2020 |
| End of production | 2024 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 7.6-8.6 l/100 km (30.9 – 27.4 US mpg) |
| CO2 emissions (WLTP) | 172-195 g/km |
| Fuel consumption (urban) | 9.0-9.2 l/100 km (26.1 – 25.6 US mpg) |
| Fuel consumption (extra urban) | 5.7-6.1 l/100 km (41.3 – 38.6 US mpg) |
| Fuel consumption (combined) | 6.9-7.2 l/100 km (34.1 – 32.7 US mpg) |
| CO2 emissions (NEDC) | 157-166 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.7 sec |
| Acceleration 0 – 62 mph | 5.7 sec |
| Acceleration 0 – 60 mph | 5.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 6.1 kg/Hp |
| Weight-to-torque ratio | 4.4 kg/Nm |
| Power | 265 Hp @ 5250-6500 rpm |
| Torque | 370 Nm @ 1600-4500 rpm (272.9 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | DMTA |
| 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 |
| Engine oil capacity | 5.2 l (5.49 US qt | 4.58 UK qt) |
| Coolant capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1610 kg (3549.44 lbs.) |
| Max. weight | 2195 kg (4839.15 lbs.) |
| Max load | 585 kg (1289.7 lbs.) |
| Trunk (boot) space – minimum | 495 l (17.48 cu. ft.) |
| Trunk (boot) space – maximum | 1495 l (52.8 cu. ft.) |
| Fuel tank capacity | 58 l (15.32 US gal | 12.76 UK gal) |
| Max. roof load | 90 kg (198.42 lbs.) |
| Permitted trailer load (8%) | 1900 kg (4188.78 lbs.) |
| Permitted trailer load (12%) | 1700 kg (3747.86 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 80 kg (176.37 lbs.) |
| Length | 4762 mm (187.48 in.) |
| Width | 1847 mm (72.72 in.) |
| Width including mirrors | 2022 mm (79.61 in.) |
| Height | 1460 mm (57.48 in.) |
| Wheelbase | 2820 mm (111.02 in.) |
| Front track | 1572 mm (61.89 in.) |
| Rear track | 1555 mm (61.22 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle | 11.6 m (38.06 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 |
The Audi A4 Avant (B9 8W) facelift 45 TFSI quattro ultra Mild Hybrid S tronic, launched in 2020, builds upon the success of the B9 generation A4. The “Avant” designation signifies the wagon (estate) body style, popular in European markets for its blend of practicality and driving dynamics. The “45 TFSI” nomenclature indicates the engine’s power output within Audi’s naming scheme, while “quattro ultra” denotes the sophisticated all-wheel-drive system with its on-demand rear axle engagement. The “Mild Hybrid” component signifies the inclusion of a 12V mild hybrid system designed to improve fuel economy and reduce emissions. This variant occupied a sweet spot in the A4 lineup, offering a significant step up in performance from the base engine options while remaining more accessible than the higher-performance S4 model.
Powertrain & Engine Architecture
At the heart of the 45 TFSI is the EA888 2.0-liter turbocharged four-cylinder engine, specifically the DMTA engine code. This engine utilizes direct fuel injection and an integrated exhaust manifold for improved thermal management and responsiveness. The turbocharger, an evolution of previous designs, provides strong boost across a wide RPM range. The engine produces 265 horsepower at 5250-6500 rpm and 370 Nm (272.9 lb-ft) of torque between 1600 and 4500 rpm. The mild hybrid system incorporates a belt-driven starter-generator (BSG) and a small lithium-ion battery. This system allows for extended start-stop operation, regenerative braking, and a slight power assist during acceleration. The seven-speed S tronic dual-clutch transmission delivers quick and smooth gear changes. This transmission is known for its efficiency and responsiveness, contributing to the car’s overall performance.
Driving Characteristics
The 45 TFSI quattro ultra S tronic offers a compelling driving experience. The engine delivers strong acceleration, with a 0-60 mph time of around 5.4 seconds. The S tronic transmission provides seamless shifts, and the quattro all-wheel-drive system ensures excellent traction in all weather conditions. The “ultra” component of the quattro system intelligently switches between front-wheel drive and all-wheel drive as needed, optimizing fuel efficiency. Compared to the base A4 engine, the 45 TFSI provides a noticeable increase in power and responsiveness. While not as aggressively tuned as the S4, it offers ample power for everyday driving and spirited excursions. The suspension is tuned for a balance of comfort and handling, providing a composed ride without sacrificing agility.
Equipment & Trim Levels
The 45 TFSI quattro ultra typically came well-equipped as standard. Features included Audi’s Virtual Cockpit digital instrument cluster, a touchscreen infotainment system with Apple CarPlay and Android Auto integration, 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, a head-up display, adaptive cruise control, and a panoramic sunroof. Trim levels varied slightly by market, but generally offered options for upgraded interior materials and exterior styling elements.
Chassis & Braking
The B9 A4 Avant features a sophisticated chassis design. The front suspension utilizes a five-link independent setup, while the rear employs a multi-link configuration. This provides excellent ride quality and handling characteristics. The 45 TFSI model typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The electronic stability control (ESC) system works in conjunction with the quattro all-wheel-drive system to maintain stability and control in challenging conditions. Steering is via a speed-sensitive electric power steering system.
Market Reception & Comparison
The Audi A4 Avant 45 TFSI quattro ultra Mild Hybrid S tronic was generally well-received by automotive critics. It was praised for its refined engine, responsive transmission, and comfortable ride. The mild hybrid system was seen as a positive step towards improved fuel efficiency. Compared to the 2.0 TFSI models with front-wheel drive, the 45 TFSI offered a significant performance upgrade and the added security of all-wheel drive. Against competitors like the BMW 3 Series Touring and Mercedes-Benz C-Class Estate, the A4 Avant was often lauded for its interior quality and technology.
Legacy
The EA888 engine family, including the DMTA variant found in the 45 TFSI, has proven to be relatively reliable. However, like any turbocharged engine, regular maintenance is crucial. Potential issues to watch for include carbon buildup on the intake valves and oil consumption. The S tronic transmission is generally durable, but requires scheduled servicing. On the used car market, the 2020-2024 A4 Avant 45 TFSI quattro ultra Mild Hybrid S tronic holds its value well, reflecting its desirable combination of performance, practicality, and technology. It remains a popular choice for buyers seeking a premium compact executive wagon.
