The Audi A6 Sedan (4G, C7) 3.0 BiTDI V6 (313 Hp) quattro Tiptronic represents a high-performance variant within the fourth generation (C7) of Audi’s flagship executive sedan, produced from 2011 to 2012. This model combined a potent turbocharged diesel engine with Audi’s renowned quattro all-wheel-drive system and an eight-speed Tiptronic automatic transmission, positioning it as a premium offering aimed at drivers seeking both performance and refinement. It served as a flagship powertrain option before the C7 received its facelift, offering a substantial step up in power and torque compared to the lower-trim A6 models.
| Brand | Audi |
| Model | A6 |
| Generation | A6 Sedan (4G, C7) |
| Type (Engine) | 3.0 BiTDI V6 (313 Hp) quattro Tiptronic |
| Start of production | December, 2011 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 8 l/100 km (29.4 US mpg, 35.3 UK mpg, 12.5 km/l) |
| Fuel consumption (extra urban) | 5.6 l/100 km (42 US mpg, 50.4 UK mpg, 17.9 km/l) |
| Fuel consumption (combined) | 6.4 l/100 km (36.8 US mpg, 44.1 UK mpg, 15.6 km/l) |
| CO2 emissions | 169 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.1 sec |
| Acceleration 0 – 62 mph | 5.1 sec |
| Acceleration 0 – 60 mph | 4.8 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 5.7 kg/Hp, 174.9 Hp/tonne |
| Weight-to-torque ratio | 2.8 kg/Nm, 363.1 Nm/tonne |
| Power | 313 Hp @ 3900-4500 rpm |
| Power per litre | 105.5 Hp/l |
| Torque | 650 Nm @ 1450-2800 rpm (479.42 lb.-ft. @ 1450-2800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | CGQB |
| 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 | 16.8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.4 l (6.76 US qt | 5.63 UK qt) |
| Kerb Weight | 1790 kg (3946.27 lbs.) |
| Max. weight | 2400 kg (5291.09 lbs.) |
| Max load | 610 kg (1344.82 lbs.) |
| Trunk (boot) space – minimum | 530 l (18.72 cu. ft.) |
| Trunk (boot) space – maximum | 995 l (35.14 cu. ft.) |
| Fuel tank capacity | 75 l (19.81 US gal | 16.5 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (8%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load with brakes (12%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 85 kg (187.39 lbs.) |
| Length | 4915 mm (193.5 in.) |
| Width | 1874 mm (73.78 in.) |
| Width including mirrors | 2086 mm (82.13 in.) |
| Height | 1468 mm (57.8 in.) |
| Wheelbase | 2912 mm (114.65 in.) |
| Front track | 1627 mm (64.06 in.) |
| Rear (Back) track | 1618 mm (63.7 in.) |
| Front overhang | 912 mm (35.91 in.) |
| Rear overhang | 1091 mm (42.95 in.) |
| Drag coefficient (Cd) | 0.26 |
| Minimum turning circle (turning diameter) | 11.9 m (39.04 ft.) |
| 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 on trapezoidal lever |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 245/45 R18 |
| Wheel rims size | 8J x 18 |
Powertrain & Engine Architecture
At the heart of the A6 3.0 BiTDI quattro Tiptronic lies the CGQB engine code, a 3.0-liter V6 diesel engine. This engine utilized a sophisticated bi-turbocharger setup, employing two turbochargers of different sizes to optimize performance across the rev range. A smaller turbocharger provided quick response at low engine speeds, minimizing turbo lag, while a larger turbocharger delivered increased power at higher speeds. The engine featured a common rail direct injection system, injecting fuel directly into the combustion chamber at extremely high pressure for improved efficiency and reduced emissions. The valvetrain employed a double overhead camshaft (DOHC) design with four valves per cylinder, enhancing volumetric efficiency. The eight-speed Tiptronic automatic transmission offered smooth and rapid gear changes, and allowed for manual gear selection when desired.
Driving Characteristics
The 3.0 BiTDI engine delivered a substantial 313 horsepower and a massive 650 Nm (479 lb-ft) of torque. This translated into brisk acceleration, with a 0-60 mph time of around 4.8 seconds and a limited top speed of 155 mph. The Tiptronic transmission was well-matched to the engine’s characteristics, providing seamless shifts and contributing to a refined driving experience. Compared to the base 2.0-liter four-cylinder models, the 3.0 BiTDI offered significantly more power and torque, resulting in effortless cruising and strong overtaking capabilities. While not as overtly sporty as the S6 variant, the 3.0 BiTDI provided a compelling balance of performance and comfort. The quattro all-wheel-drive system ensured excellent traction in all weather conditions, enhancing stability and control.
Equipment & Trim Levels
The 3.0 BiTDI quattro Tiptronic typically came equipped with a generous array of standard features. These included leather upholstery, multi-adjustable front seats with memory function, a premium sound system, dual-zone automatic climate control, and a multi-function steering wheel. Standard exterior features included alloy wheels, xenon headlights, and front and rear parking sensors. Optional extras included a panoramic sunroof, adaptive cruise control, a navigation system, and advanced driver assistance systems such as blind spot monitoring and lane departure warning. The A6 offered a range of interior trim options, allowing buyers to personalize the cabin to their preferences.
Chassis & Braking
The A6 3.0 BiTDI featured an independent multi-link suspension system at the front and an independent trapezoidal lever suspension at the rear, providing a comfortable and controlled ride. The suspension was tuned to balance handling and comfort, offering a good compromise between sporty responsiveness and everyday usability. The braking system consisted of ventilated discs at the front and solid discs at the rear, providing ample stopping power. Anti-lock braking system (ABS) and electronic stability control (ESC) were standard features, enhancing safety and stability.
Market Reception & Comparison
The Audi A6 3.0 BiTDI quattro Tiptronic was generally well-received by automotive critics. It was praised for its powerful engine, refined transmission, comfortable ride, and luxurious interior. Fuel economy was also considered to be good for a vehicle of its size and performance, averaging around 37 mpg on the combined cycle. Compared to other trims in the A6 lineup, the 3.0 BiTDI offered a significant performance upgrade, but at a higher price point. It competed with other premium executive sedans such as the BMW 535d and the Mercedes-Benz E350 CDI.
Legacy
The CGQB engine, while robust, is known to require diligent maintenance, particularly regarding the diesel particulate filter (DPF) and turbochargers. Regular oil changes and the use of high-quality fuel are crucial for long-term reliability. Today, well-maintained examples of the A6 3.0 BiTDI are sought after in the used car market for their combination of performance, luxury, and all-weather capability. However, potential buyers should be aware of the potential maintenance costs associated with a high-performance diesel engine and ensure a thorough inspection before purchase. The C7 A6, in general, is considered a well-built and reliable vehicle, and the 3.0 BiTDI variant remains a desirable option for those seeking a refined and capable executive sedan.
