The Alpina B3 Touring (E46) 3.3i 24V B3S, 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 a significantly upgraded engine, suspension, and interior refinements. This model occupied a niche position, offering a more exclusive and powerful alternative to the standard BMW 3 Series wagons, and even the higher-performance M3 Touring which was never officially produced. The B3 Touring B3S, with its 305 horsepower, aimed to deliver a compelling experience for drivers seeking a versatile, yet exhilarating, vehicle.
Technical Specifications
| Brand | Alpina |
| Model | B3 |
| Generation | B3 Touring (E46) |
| Type (Engine) | 3.3i 24V B3S (305 Hp) |
| Start of production | 2003 |
| End of production | 2006 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 16.4 l/100 km (14.3 US mpg, 17.2 UK mpg, 6.1 km/l) |
| Fuel consumption (economy) – extra urban | 8 l/100 km (29.4 US mpg, 35.3 UK mpg, 12.5 km/l) |
| Fuel consumption (economy) – combined | 11.1 l/100 km (21.2 US mpg, 25.4 UK mpg, 9 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.8 sec |
| Acceleration 0 – 62 mph | 5.8 sec |
| Acceleration 0 – 60 mph | 5.5 sec |
| Maximum speed | 266 km/h (165.28 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 (Back) track | 1481 mm (58.31 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, manual 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 ZR18; 255/35 ZR18 |
| Wheel rims size | 8J x 18; 9J X 18 |
Powertrain & Engine Architecture
At the heart of the B3 Touring B3S lies the Alpina-modified version of the BMW M3’s S54 inline-six engine. While sharing the same basic architecture as the S54, Alpina made significant changes to optimize the engine for a broader powerband and increased usability. The 3.3-liter engine (3346 cc) featured a slightly reduced compression ratio (10.2:1 compared to the M3’s 11.5:1) and revised camshafts. These modifications, along with a high-flow exhaust system, resulted in 305 horsepower at 6300 rpm and 362 Nm (267 lb-ft) of torque at 4800 rpm. The engine utilized a multi-port fuel injection system and a double overhead camshaft (DOHC) valvetrain. The B3S was exclusively offered with a six-speed manual transmission, providing precise control and enhancing the driving experience. This transmission was specifically tuned to complement the engine’s characteristics, offering close ratios for spirited driving.
Driving Characteristics
The B3 Touring B3S offered a distinctly different driving experience compared to the standard E46 wagons or even the higher-output BMW models. The 305 hp engine provided brisk acceleration, with 0-60 mph times consistently around 5.5 seconds. The manual transmission allowed for full control over the engine’s power, making it engaging to drive on winding roads. While not as razor-sharp as the M3, the B3 Touring offered a more compliant ride quality, making it a more comfortable daily driver. The suspension was tuned to balance performance and comfort, providing good body control without sacrificing ride quality. The weight distribution was well-balanced, contributing to neutral handling characteristics.
Equipment & Trim Levels
The Alpina B3 Touring B3S was a well-equipped vehicle, featuring a high level of standard equipment. Interior appointments included Alpina-specific leather upholstery, wood trim, and unique instrumentation. Standard features also included automatic climate control, power-adjustable seats, and a premium sound system. Optional extras included a sunroof, navigation system, and upgraded audio options. Alpina also offered a range of bespoke customization options, allowing customers to personalize their vehicles to their specific preferences.
Chassis & Braking
The B3 Touring retained the E46’s MacPherson strut front suspension and multi-link rear suspension, but with Alpina-specific tuning. Stiffer springs and dampers were employed to improve handling and reduce body roll. The braking system consisted of ventilated discs on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) was standard. The B3 Touring featured a slightly wider track than the standard E46, further enhancing its stability.
Market Reception & Comparison
The Alpina B3 Touring B3S was well-received by automotive critics, who praised its blend of performance, practicality, and exclusivity. It was often seen as a compelling alternative to the standard E46 wagons and a more usable option than the M3. Fuel economy, while not a primary concern for buyers of this vehicle, was reasonable for its performance level, averaging around 21.2 US mpg combined. Reliability was generally good, although maintenance costs were higher than those of a standard BMW due to the specialized nature of the Alpina components. Compared to the E46 330i wagon, the B3S offered significantly more power and performance. Compared to a potential M3, the B3S offered a more comfortable ride and greater practicality due to its wagon body style.
Legacy
The Alpina B3 Touring (E46) remains a sought-after vehicle among enthusiasts. Its combination of performance, practicality, and exclusivity has made it a collectible model. The 3.3-liter engine is known for its durability and reliability, provided it is properly maintained. Today, well-maintained examples command a premium in the used car market. The B3 Touring represents a unique chapter in the E46’s history, showcasing Alpina’s ability to create compelling and distinctive automobiles.
