The Alpina B3 Touring (E46) 3.3 i 24V B3S Automatic, produced between 2003 and 2006, represents a unique blend of high performance and practicality within the BMW E46 generation. Alpina, a renowned German automotive engineering company, took the standard E46 Touring (wagon) and elevated it with significant mechanical and aesthetic enhancements. This particular variant, the B3S, was positioned as the higher-performance version of the B3 Touring, offering a substantial power increase over the base model and aimed at drivers seeking a more engaging experience without sacrificing the utility of a station wagon. It occupied a niche market, appealing to those who desired a sports car’s performance in a more versatile package.
Technical Specifications
| Brand | Alpina |
| Model | B3 |
| Generation | B3 Touring (E46) |
| Type | 3.3 i 24V B3S (305 Hp) Automatic |
| Start of production | 2003 |
| End of production | 2006 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 18.2 l/100 km (12.9 US mpg, 15.5 UK mpg, 5.5 km/l) |
| Fuel consumption (extra urban) | 8.1 l/100 km (29 US mpg, 34.9 UK mpg, 12.3 km/l) |
| Fuel consumption (combined) | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.6 sec |
| Acceleration 0 – 62 mph | 6.6 sec |
| Acceleration 0 – 60 mph | 6.3 sec |
| Maximum speed | 261 km/h (162.18 mph) |
| Weight-to-power ratio | 5 kg/Hp, 200 Hp/tonne |
| Weight-to-torque ratio | 4.2 kg/Nm, 237.4 Nm/tonne |
| Power | 305 Hp @ 6300 rpm |
| Power per litre | 91.2 Hp/l |
| Torque | 362 Nm @ 4800 rpm (267 lb.-ft. @ 4800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine displacement | 3346 cm3 (204.19 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 87 mm (3.43 in.) |
| Piston Stroke | 93.8 mm (3.69 in.) |
| Compression ratio | 10.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Kerb Weight | 1525 kg (3362.05 lbs.) |
| Max. weight | 2065 kg (4552.55 lbs.) |
| Max load | 540 kg (1190.5 lbs.) |
| Trunk (boot) space – minimum | 435 l (15.36 cu. ft.) |
| Trunk (boot) space – maximum | 1345 l (47.5 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal, 13.86 UK gal) |
| Length | 4478 mm (176.3 in.) |
| Width | 1739 mm (68.46 in.) |
| Height | 1409 mm (55.47 in.) |
| Wheelbase | 2725 mm (107.28 in.) |
| Front track | 1471 mm (57.91 in.) |
| Rear track | 1481 mm (58.31 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears | 5 |
| Gearbox type | Automatic transmission |
| Front suspension | Wishbone |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 225/40 R18; 255/35 ZR 18 |
| Wheel rims size | 8J x 18; 9J x 18 |
Powertrain & Engine Architecture
At the heart of the B3S Touring lies a modified version of the BMW M3’s S54 inline-six engine, albeit detuned for greater reliability and a broader powerband. While the M3’s S54 produced 330 hp, Alpina’s version was rated at 305 hp. The engine code is typically associated with Alpina’s internal designations rather than BMW’s. The 3.3-liter displacement is achieved through an increased bore and stroke compared to the standard E46 engines. The engine features double VANOS (variable valve timing) for both intake and exhaust camshafts, optimizing performance across the rev range. Fuel is delivered via a multi-port fuel injection system. The B3S exclusively utilized a 5-speed automatic transmission, specifically a ZF 5HP30, known for its smoothness and durability. Alpina recalibrated the transmission control unit to provide quicker shifts and a more responsive driving experience compared to the standard BMW automatic.
Driving Characteristics
The B3S Touring Automatic delivers a refined yet potent driving experience. The automatic transmission, while not as engaging as a manual, provides seamless gear changes and makes the car exceptionally comfortable for long-distance cruising. Acceleration from 0-60 mph takes approximately 6.3 seconds, and the car can reach a top speed of 162 mph. The engine’s torque peak of 267 lb-ft at 4800 rpm provides strong pull throughout the mid-range, making overtaking effortless. Compared to the standard E46 Touring or even the 3.0i models, the B3S feels significantly more powerful and responsive. However, it lacks the razor-sharp handling and immediate throttle response of the M3, prioritizing a more balanced and comfortable ride.
Equipment & Trim Levels
The B3S Touring came generously equipped as standard. Interior appointments included Alpina-specific sports seats upholstered in high-quality leather, a unique Alpina steering wheel, and wood trim. Standard features also included automatic climate control, a premium sound system, and power-adjustable front seats. Optional extras included a sunroof, navigation system, and upgraded audio options. Alpina offered a range of bespoke customization options, allowing customers to personalize their vehicles to their exact specifications.
Chassis & Braking
Alpina made subtle but effective changes to the E46 Touring’s chassis to accommodate the increased power. The suspension was stiffened with firmer springs and dampers, and a thicker stabilizer bar was fitted to reduce body roll. The B3S utilized ventilated disc brakes on all four wheels, providing ample stopping power. The ABS system was also recalibrated to work optimally with the increased performance capabilities.
Market Reception & Comparison
The Alpina B3S Touring was well-received by automotive critics, who praised its blend of performance, luxury, and practicality. It was often seen as a compelling alternative to the BMW M3 Touring (which was never officially offered by BMW), offering a more comfortable ride and a more refined interior. Fuel economy, while not a priority for most buyers, was reasonable for a high-performance wagon, averaging around 20 mpg in combined driving. Reliability was generally good, although maintenance costs were higher than those of a standard E46 due to the specialized components and Alpina’s higher labor rates.
Legacy
Today, the Alpina B3S Touring (E46) is a sought-after vehicle among enthusiasts and collectors. Its rarity, combined with its unique blend of performance and practicality, has made it a desirable classic. The 3.3-liter engine and ZF automatic transmission are known for their durability, but regular maintenance is essential to keep them in top condition. Values have been steadily increasing in recent years, reflecting the growing appreciation for Alpina’s engineering prowess and the E46 generation’s enduring appeal. The B3S Touring stands as a testament to Alpina’s ability to create truly special and engaging automobiles.
