The Audi A4 (B6), produced between 2001 and 2005, represented a significant evolution for Audi’s popular compact executive car. The 2.4i V6 30V variant, equipped with the Multitronic continuously variable transmission (CVT), was introduced in 2001 and continued through 2004. This model occupied a mid-range position within the B6 A4 lineup, offering a balance of performance and refinement compared to the base 1.8T and the performance-oriented 3.0 V6 models. It was primarily sold in European and North American markets, appealing to buyers seeking a sophisticated and comfortable driving experience with a more powerful engine option than the standard four-cylinder.
Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 (B6 8E) |
| Type (Engine) | 2.4i V6 30V (170 Hp) Multitronic |
| Start of production | 2001 |
| End of production | 2004 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 13.5 l/100 km (17.4 US mpg, 20.9 UK mpg) |
| Fuel consumption (extra urban) | 6.9 l/100 km (34.1 US mpg, 40.9 UK mpg) |
| Fuel consumption (combined) | 9.3 l/100 km (25.3 US mpg, 30.4 UK mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.9 sec |
| Acceleration 0 – 62 mph | 8.9 sec |
| Acceleration 0 – 60 mph | 8.5 sec |
| Maximum speed | 222 km/h (137.94 mph) |
| Weight-to-power ratio | 8.7 kg/Hp |
| Weight-to-torque ratio | 6.4 kg/Nm |
| Power | 170 Hp @ 6000 rpm |
| Power per litre | 71 Hp/l |
| Torque | 230 Nm @ 3200 rpm (169.64 lb.-ft. @ 3200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | BDV |
| Engine displacement | 2393 cm3 (146.03 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 81 mm (3.19 in.) |
| Piston Stroke | 77.4 mm (3.05 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 5 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 6 l (6.34 US qt | 5.28 UK qt) |
| Coolant capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1475 kg (3251.82 lbs.) |
| Max. weight | 2025 kg (4464.36 lbs.) |
| Max load | 550 kg (1212.54 lbs.) |
| Trunk (boot) space – minimum | 445 l (15.72 cu. ft.) |
| Trunk (boot) space – maximum | 720 l (25.43 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| Length | 4548 mm (179.06 in.) |
| Width | 1772 mm (69.76 in.) |
| Height | 1428 mm (56.22 in.) |
| Wheelbase | 2650 mm (104.33 in.) |
| Front track | 1528 mm (60.16 in.) |
| Rear track | 1526 mm (60.08 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle | 11.1 m (36.42 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears and type of gearbox | automatic transmission Multitronic |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 205/55 R16 |
| Wheel rims size | 16 |
Powertrain & Engine Architecture
The heart of the 2.4i variant is the BDV engine, a 2.4-liter naturally aspirated V6. This engine utilizes a 30-valve (5 valves per cylinder) dual overhead camshaft (DOHC) configuration. It features multi-port fuel injection, delivering fuel directly into the intake ports. The engine’s design prioritized smooth power delivery and refinement over outright peak horsepower. The Multitronic transmission, a continuously variable transmission (CVT), was a key feature. Unlike traditional automatic transmissions with fixed gear ratios, the Multitronic uses a chain and pulley system to provide a virtually infinite number of gear ratios, optimizing engine efficiency and responsiveness. This transmission was known for its smooth operation and ability to keep the engine in its optimal power band.
Driving Characteristics
The 2.4i V6 with the Multitronic offered a distinctly different driving experience compared to the 1.8T or the 3.0 V6 A4 models. While not as quick as the 3.0, the 2.4 provided ample power for everyday driving and highway passing. The Multitronic transmission contributed to a smooth, linear acceleration feel. The CVT’s ability to seamlessly adjust the gear ratio meant there were no noticeable gear shifts, resulting in a refined driving experience. However, some drivers found the CVT’s operation to be less engaging than a traditional automatic or manual transmission. The lack of distinct gear changes could feel somewhat disconnected. The 0-60 mph time of around 8.5 seconds was respectable for the era, but noticeably slower than the 3.0 V6.
Equipment & Trim Levels
The 2.4i V6 typically came with a fairly comprehensive list of standard features. This included automatic climate control, power windows and locks, a premium audio system, and alloy wheels. Interior upholstery was generally cloth, with leather options available as an upgrade. Optional extras included a sunroof, heated seats, and a navigation system. The trim level often dictated the availability of these options. The 2.4i was often positioned as a step up from the base 1.8T, offering more standard features and a more luxurious interior.
Chassis & Braking
The B6 A4 featured fully independent multi-link suspension on both the front and rear axles, providing a comfortable ride and good handling characteristics. The 2.4i models typically came equipped with ventilated disc brakes on the front and solid disc brakes on the rear. Anti-lock braking system (ABS) was standard. The suspension tuning was geared towards comfort and stability, rather than outright sportiness. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The 2.4i V6 Multitronic was generally well-received by automotive critics. It was praised for its smooth engine, refined transmission, and comfortable ride. However, some reviewers noted that the CVT lacked the engagement of a traditional automatic or manual transmission. Compared to the 1.8T, the 2.4i offered significantly more power and a more refined driving experience, but at a higher price point. The 3.0 V6 provided even more performance, but was considerably more expensive and had slightly lower fuel economy. Fuel economy for the 2.4i was rated at around 25.3 US mpg combined, which was reasonable for a V6 engine of that era.
Legacy
The BDV engine, while generally reliable, is known to be susceptible to oil consumption issues as it ages, particularly if maintenance has been neglected. The Multitronic transmission, while innovative, can be expensive to repair if it fails. Regular fluid changes are crucial for maintaining its longevity. Today, the 2.4i V6 B6 A4 represents a good value in the used car market, offering a comfortable and refined driving experience at an affordable price. However, potential buyers should be aware of the potential maintenance costs associated with the engine and transmission. The B6 A4, in general, is considered a well-built and durable car, and the 2.4i variant remains a popular choice for those seeking a comfortable and reliable European sedan.
