The Audi A4 (B9 8W) 50 TDI quattro Mild Hybrid tiptronic, produced from September 2020 to February 2023, represents a significant iteration of Audi’s popular executive sedan. This variant, part of the B9 facelift generation, positioned itself as a premium offering within the A4 lineup, blending performance, efficiency, and advanced technology. It caters to buyers seeking a refined driving experience with the added benefits of all-wheel drive and mild hybrid assistance. The 50 TDI utilizes a 3.0-liter V6 diesel engine paired with an eight-speed tiptronic automatic transmission and Audi’s quattro all-wheel-drive system, incorporating a 48-volt mild hybrid electric vehicle (MHEV) system.
Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 (B9 8W, facelift 2019) |
| Type (Engine) | 50 TDI (286 Hp) quattro Mild Hybrid tiptronic |
| Start of production | September, 2020 |
| End of production | February, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 6.4-7.2 l/100 km (36.8 – 32.7 US mpg) |
| CO2 emissions (WLTP) | 168-188 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.2 sec |
| Acceleration 0 – 62 mph | 5.2 sec |
| Acceleration 0 – 60 mph | 4.9 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Power | 286 Hp @ 3500-4000 rpm |
| Torque | 620 Nm @ 1750-3000 rpm (457.29 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | DMGA |
| Engine displacement | 2967 cm3 (181.06 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 91.4 mm (3.6 in.) |
| Compression ratio | 16.3:1 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 6.1 l (6.45 US qt | 5.37 UK qt) |
| Coolant | 15.2 l (16.06 US qt | 13.37 UK qt) |
| Kerb Weight | 1750 kg (3858.09 lbs.) |
| Max. weight | 2320 kg (5114.72 lbs.) |
| Trunk (boot) space – minimum | 460 l (16.24 cu. ft.) |
| Fuel tank capacity | 58 l (15.32 US gal | 12.76 UK gal) |
| Number of gears and type of gearbox | 8 gears, automatic transmission tiptronic |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Length | 4762 mm (187.48 in.) |
| Width | 1847 mm (72.72 in.) |
| Height | 1431 mm (56.34 in.) |
Powertrain & Engine Architecture
The heart of the A4 50 TDI is the DMGA engine, a 3.0-liter V6 turbocharged diesel engine. This engine benefits from a sophisticated diesel common rail fuel injection system, delivering precise fuel metering for optimal combustion. The engine utilizes a variable geometry turbocharger (VGT) and an intercooler to maximize power and efficiency. The 24-valve configuration (four valves per cylinder) further enhances breathing and performance. The mild hybrid system, operating at 48 volts, incorporates a belt starter generator (BSG) and a small lithium-ion battery. This system allows for extended start-stop functionality, regenerative braking, and a slight power boost during acceleration. The eight-speed tiptronic automatic transmission is a torque-converter type, known for its smooth shifts and responsiveness. It features adaptive shift programs that adjust to the driver’s style and road conditions.
Driving Characteristics
The 50 TDI quattro tiptronic delivers a refined and capable driving experience. The 620 Nm (457 lb-ft) of torque, available from 1750 to 3000 rpm, provides strong acceleration in all gears. The 0-60 mph time of around 4.9 seconds is impressive for a diesel-powered sedan. The tiptronic transmission offers quick and seamless gear changes, contributing to a smooth power delivery. Compared to the lower-powered 2.0 TDI variants, the 50 TDI offers significantly more performance and a more relaxed driving experience, particularly during highway cruising and overtaking. While not as sporty as the S4, the 50 TDI provides ample power for most drivers. The quattro all-wheel-drive system ensures excellent traction and stability in various weather conditions.
Equipment & Trim Levels
The A4 50 TDI quattro typically came well-equipped as a higher-end trim. Standard features generally included Audi’s Virtual Cockpit (a fully digital instrument cluster), a touchscreen infotainment system with navigation, leather upholstery, three-zone automatic climate control, and a suite of driver-assistance systems such as adaptive cruise control, lane departure warning, and automatic emergency braking. Optional extras could include a Bang & Olufsen sound system, a head-up display, and matrix LED headlights. Interior trim options varied, with choices in wood, aluminum, or carbon fiber accents.
Chassis & Braking
The A4 B9 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 50 TDI variant typically featured slightly stiffer springs and dampers compared to the lower-powered models to manage the increased weight and power. Braking duties are handled by 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 enhance stability and control.
Market Reception & Comparison
The A4 50 TDI quattro was generally well-received by automotive critics. It was praised for its powerful and refined engine, comfortable ride, and advanced technology. Fuel economy, while not exceptional for a diesel, was considered respectable for a vehicle of its size and performance. Compared to the 2.0 TDI variants, the 50 TDI offered a significant performance upgrade, justifying the higher price tag for buyers prioritizing power and refinement. Compared to gasoline-powered A4 models, the 50 TDI offered better fuel economy and torque, making it a popular choice for long-distance drivers.
Legacy
The Audi A4 B9 50 TDI quattro Mild Hybrid tiptronic represents a compelling blend of performance, efficiency, and technology. The DMGA engine, while complex, has proven to be relatively reliable when properly maintained. The mild hybrid system adds a layer of efficiency without significantly impacting the driving experience. On the used car market, these models hold their value relatively well due to their desirable combination of features and performance. Potential buyers should be aware of the maintenance requirements associated with diesel engines, including regular servicing of the diesel particulate filter (DPF) and AdBlue system. Overall, the A4 50 TDI quattro remains a strong contender in the executive sedan segment, offering a refined and capable driving experience.
