The Audi Q8 45 TDI, introduced with the 2023 facelift of the 4M generation, represents a compelling blend of luxury, performance, and efficiency within Audi’s SUV lineup. Production began in September 2023, positioning this variant as a key offering in the mid-range of the Q8 family. It’s built on the MLB Evo platform, shared with other Volkswagen Group vehicles like the Porsche Cayenne and Lamborghini Urus, and aims to deliver a refined driving experience with a focus on diesel-powered torque and modern mild-hybrid technology. This model is primarily targeted towards the European and Asian markets, where diesel engines remain popular, though it is also available in select regions globally.
Technical Specifications
| Brand | Audi |
| Model | Q8 |
| Generation | Q8 (4M, facelift 2023) |
| Type (Engine) | 45 TDI V6 (231 Hp) Mild Hybrid quattro tiptronic |
| Start of production | September, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 8-8.9 l/100 km (29.4 – 26.4 US mpg, 35.3 – 31.7 UK mpg, 12.5 – 11.2 km/l) |
| CO2 emissions (WLTP) | 210-232 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.1 sec |
| Acceleration 0 – 62 mph | 7.1 sec |
| Acceleration 0 – 60 mph | 6.7 sec |
| Maximum speed | 226 km/h (140.43 mph) |
| Emission standard | Euro 6e |
| Weight-to-power ratio | 9.4 kg/Hp, 106.9 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 231.5 Nm/tonne |
| Battery voltage | 48 V |
| Battery location | Under the trunk |
| Power | 231 Hp @ 3500-5000 rpm |
| Power per litre | 77.9 Hp/l |
| Torque | 500 Nm @ 1500-3000 rpm (368.78 lb.-ft. @ 1500-3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | DHXC |
| Engine displacement | 2967 cm3 (181.06 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 6.1 l (6.45 US qt | 5.37 UK qt) |
| Coolant | 12.3 l (13 US qt | 10.82 UK qt) |
| Kerb Weight | 2160 kg (4761.98 lbs.) |
| Max. weight | 2900 kg (6393.41 lbs.) |
| Max load | 740 kg (1631.42 lbs.) |
| Trunk (boot) space – minimum | 605 l (21.37 cu. ft.) |
| Fuel tank capacity | 85 l (22.45 US gal | 18.7 UK gal) |
| AdBlue tank | 24 l (6.34 US gal | 5.28 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2800 kg (6172.94 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 115 kg (253.53 lbs.) |
| Length | 4992 mm (196.54 in.) |
| Width | 1995 mm (78.54 in.) |
| Width including mirrors | 2190 mm (86.22 in.) |
| Height | 1697 mm (66.81 in.) |
| Wheelbase | 2998 mm (118.03 in.) |
| Front track | 1679 mm (66.1 in.) |
| Rear (Back) track | 1691 mm (66.57 in.) |
| Front overhang | 985 mm (38.78 in.) |
| Rear overhang | 1009 mm (39.72 in.) |
| Drivetrain Architecture | ICE and electric motor drive all four wheels |
| Drive wheel | All wheel drive (4×4) |
| 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 |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 275/50 R20 |
| Wheel rims size | 20 |
Powertrain & Engine Architecture
The heart of the Q8 45 TDI is the 3.0-liter V6 diesel engine, designated DHXC. This engine utilizes a sophisticated diesel commonrail fuel injection system, delivering fuel at extremely high pressures for optimized combustion. A single turbocharger, coupled with an intercooler, provides forced induction, boosting power and torque. The engine produces 231 horsepower at 3500-5000 rpm and a substantial 500 Nm (368.78 lb-ft) of torque between 1500-3000 rpm. What sets this variant apart is its 48V mild-hybrid system. This system incorporates a belt starter generator (BSG) and a small 48V lithium-ion battery. The BSG allows for extended start-stop functionality, regenerative braking to recoup energy, and a limited amount of electric assistance during acceleration. The transmission is an 8-speed tiptronic automatic, known for its smooth shifts and responsive operation. This transmission is specifically tuned to work with the engine’s torque characteristics, providing efficient power delivery.
Driving Characteristics
The Q8 45 TDI Automatic offers a comfortable and capable driving experience. The abundance of low-end torque from the diesel engine makes it feel effortless in everyday driving situations. Acceleration to 60 mph takes approximately 6.7 seconds, which is respectable for a large SUV. Compared to higher-output Q8 variants like the 50 TDI, the 45 TDI feels less overtly sporty, but it compensates with improved fuel economy and a more relaxed driving character. The tiptronic transmission generally selects the appropriate gear for the situation, but manual shifting is available via paddle shifters for more driver control. The quattro all-wheel-drive system provides excellent traction in various conditions, enhancing stability and confidence. The mild-hybrid system is largely transparent to the driver, contributing to a slight improvement in fuel efficiency without noticeably impacting performance.
Equipment & Trim Levels
The Q8 45 TDI typically comes well-equipped as standard. Interior features generally include leather upholstery, power-adjustable front seats with memory function, a panoramic sunroof, and a premium sound system. The infotainment system features a dual-screen setup with Audi’s MMI touch response technology. Standard safety features include adaptive cruise control, lane departure warning, and automatic emergency braking. Optional extras often include upgraded leather packages, a head-up display, massaging seats, and advanced driver-assistance systems. Trim levels can vary by market, but generally, the 45 TDI sits in the mid-range of the Q8 lineup, offering a balance of luxury and value.
Chassis & Braking
The Q8 45 TDI utilizes an independent multi-link suspension setup at both the front and rear axles. This provides a comfortable ride quality while maintaining good handling characteristics. The suspension is tuned to prioritize comfort over outright sportiness, but it still offers a secure and controlled feel. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The electronic stability control (ESC) system and anti-lock braking system (ABS) work in conjunction to enhance safety and stability. The Q8’s weight, around 2160 kg (4761.98 lbs), is managed effectively by the suspension and braking systems.
Market Reception & Comparison
The Audi Q8 45 TDI has been generally well-received by automotive critics. It’s praised for its refined engine, comfortable ride, and luxurious interior. Fuel economy is a strong point, with combined consumption figures ranging from 8-8.9 l/100 km. Compared to the more powerful Q8 50 TDI, the 45 TDI offers a more affordable entry point into the Q8 range, albeit with slightly less performance. Against competitors like the BMW X6 and Mercedes-Benz GLE, the Q8 45 TDI holds its own with its sophisticated technology and premium feel. Reliability reports suggest that the 3.0-liter TDI engine is generally robust, but regular maintenance is crucial for long-term durability.
Legacy
The Audi Q8 45 TDI, with its 3.0-liter TDI engine and 8-speed tiptronic transmission, represents a modern interpretation of the luxury diesel SUV. The mild-hybrid technology adds a layer of efficiency without compromising the driving experience. In the used car market, these models are expected to hold their value reasonably well, particularly those with a full service history and low mileage. The longevity of the engine and transmission, combined with Audi’s reputation for build quality, should ensure that these vehicles remain desirable for years to come. However, potential buyers should be aware of the increasing scrutiny surrounding diesel emissions and ensure that the vehicle meets local emissions standards.
