The Audi A4 Avant 45 TFSI quattro ultra S tronic, produced from 2019, represents a significant iteration of the B9 (8W) generation A4 Avant, following the facelift introduced in 2018. This variant occupies a mid-to-upper position within the A4 Avant lineup, offering a blend of performance, technology, and practicality aimed at buyers seeking a refined and capable all-weather wagon. It builds upon the established A4 platform (shared with the Volkswagen Passat and Škoda Superb) and caters to the North American market’s increasing preference for premium compact wagons, though its primary sales volume remained in Europe.
Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 Avant (B9 8W, facelift 2018) |
| Type (Engine) | 45 TFSI (245 Hp) quattro ultra S tronic |
| Start of production | 2019 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 8.4-8.6 l/100 km (28 – 27.4 US mpg) |
| Fuel consumption (extra urban) | 5.3-5.8 l/100 km (44.4 – 40.6 US mpg) |
| Fuel consumption (combined) | 6.4-6.8 l/100 km (36.8 – 34.6 US mpg) |
| CO2 emissions | 147-155 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 – TEMP |
| Weight-to-power ratio | 6.5 kg/Hp, 154.6 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 233.4 Nm/tonne |
| Power | 245 Hp @ 5000-6500 rpm |
| Torque | 370 Nm @ 1600-4300 rpm (272.9 lb.-ft. @ 1600-4300 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | DKNA |
| Engine displacement | 1984 cm3 (121.07 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| 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) |
| Kerb Weight | 1585 kg (3494.33 lbs.) |
| Max. weight | 2175 kg (4795.05 lbs.) |
| Max load | 590 kg (1300.73 lbs.) |
| Trunk (boot) space – minimum | 495 l (17.48 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 with brakes (8%) | 1900 kg (4188.78 lbs.) |
| Permitted trailer load with brakes (12%) | 1700 kg (3747.86 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 80 kg (176.37 lbs.) |
| Length | 4738 mm (186.54 in.) |
| Width | 1842 mm (72.52 in.) |
| Width including mirrors | 2022 mm (79.61 in.) |
| Height | 1435 mm (56.5 in.) |
| Wheelbase | 2820 mm (111.02 in.) |
| Front track | 1572 mm (61.89 in.) |
| Rear (Back) track | 1555 mm (61.22 in.) |
| Front overhang | 880 mm (34.65 in.) |
| Rear overhang | 1038 mm (40.87 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels permanently, and the rear wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 7 gears, automatic transmission S tronic |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/50 R17 |
| Wheel rims size | 7.5 J x 17 |
INTRODUCTION
The Audi A4 Avant 45 TFSI quattro ultra S tronic, launched in 2019, is a station wagon (estate) variant of the B9 A4 series, benefitting from the mid-cycle refresh. The “45 TFSI” designation indicates the engine’s power output within Audi’s naming scheme, while “quattro ultra” denotes the on-demand all-wheel-drive system. The “S tronic” label identifies the seven-speed dual-clutch transmission. This model aimed to provide a premium, technologically advanced wagon experience, appealing to buyers prioritizing performance, safety, and practicality. It was positioned as a step up from the base A4 Avant trims, offering more power and sophisticated all-wheel drive.
Powertrain & Engine Architecture
At the heart of the 45 TFSI is the 2.0-liter inline-four cylinder engine, internally designated as the DKNA. This engine utilizes direct fuel injection and a single turbocharger with an intercooler to produce 245 horsepower at 5000-6500 rpm and 272.9 lb.-ft. of torque between 1600-4300 rpm. The engine features an aluminum block and head, contributing to its relatively lightweight construction. The S tronic seven-speed dual-clutch transmission provides rapid and smooth gear changes. The “quattro ultra” system is a sophisticated on-demand all-wheel-drive system. Under normal driving conditions, the system operates in front-wheel drive to maximize fuel efficiency. When traction is needed, a multi-plate clutch engages the rear axle, distributing torque as required. This system differs from the traditional Torsen-based quattro system found in higher-performance Audi models.
Driving Characteristics
The 45 TFSI S tronic offers a noticeably more engaging driving experience than lower-powered A4 Avant variants. The 245 hp engine provides brisk acceleration, achieving 0-60 mph in approximately 5.7 seconds. The S tronic transmission contributes to this performance with its quick shifts and responsive behavior. The “quattro ultra” system provides excellent traction in various weather conditions, enhancing stability and confidence. While not as overtly sporty as the S4 Avant, the 45 TFSI strikes a good balance between comfort and performance. The gear ratios are tuned for both acceleration and highway cruising, providing ample power for overtaking maneuvers. Compared to a manual transmission equipped A4 Avant, the S tronic offers convenience and ease of use, though some enthusiasts may prefer the greater control of a manual gearbox.
Equipment & Trim Levels
The 45 TFSI quattro ultra S tronic typically came well-equipped as standard. Features included Audi’s MMI infotainment system with a 7-inch touchscreen display (larger screens were optional), tri-zone automatic climate control, leather upholstery, heated front seats, and a rearview camera. Optional extras included a virtual cockpit digital instrument cluster, a Bang & Olufsen sound system, navigation, and various driver-assistance features such as adaptive cruise control and lane-keeping assist. Interior trim options ranged from brushed aluminum to wood veneers, allowing buyers to personalize the cabin. Exterior styling cues included distinctive alloy wheel designs and chrome accents.
Chassis & Braking
The A4 Avant features a sophisticated suspension system designed to provide a comfortable yet controlled ride. The front suspension utilizes a multi-link setup, while the rear also employs a multi-link design. This configuration helps to minimize body roll and provide precise handling. Ventilated disc brakes are fitted to all four wheels, providing ample stopping power. The electronic stability control (ESC) system works in conjunction with the ABS (Anti-lock Braking System) to enhance safety and stability. The chassis is relatively lightweight, contributing to the car’s agility. Steering is provided by an electric power steering system, offering precise and responsive control.
Market Reception & Comparison
The Audi A4 Avant 45 TFSI quattro ultra S tronic was generally well-received by automotive critics. It was praised for its refined driving experience, spacious interior, and advanced technology. Fuel economy was considered competitive for its class, with combined figures ranging from 34.6 to 36.8 US mpg. Compared to the lower-powered 40 TFSI A4 Avant, the 45 TFSI offered a significant performance upgrade. Compared to the diesel-powered A4 Avants (like the 40 TDI), the 45 TFSI provided a more responsive and engaging driving experience, albeit with slightly higher fuel consumption. The BMW 3 Series Touring and Mercedes-Benz C-Class Estate were its primary competitors.
Legacy
The 2.0-liter turbocharged engine and S tronic transmission combination used in the A4 Avant 45 TFSI have proven to be relatively reliable. While some early S tronic transmissions experienced issues, these were largely addressed through software updates and revised components. The “quattro ultra” system has also demonstrated good durability. On the used car market, these A4 Avants hold their value reasonably well, particularly those with low mileage and a full service history. They remain a popular choice for buyers seeking a premium, all-weather wagon with a good balance of performance, practicality, and technology.
