The Alpina B5 (E60), produced between 2005 and 2008, represents a high-performance iteration of the BMW 5 Series (E60) sedan. Alpina, a renowned German automotive engineering company, independently refined the 5 Series, creating a vehicle that blended luxury, performance, and exclusivity. The B5 4.4 V8 (500 Hp) Switch-Tronic variant occupied the top echelon of the B5 lineup, offering a significant power upgrade and a unique transmission experience compared to the standard BMW offerings and other B5 configurations. It was positioned as a direct competitor to high-performance sedans from Mercedes-AMG and Audi Sport, appealing to drivers seeking a refined yet exhilarating driving experience.
Technical Specifications
| Brand | Alpina |
| Model | B5 |
| Generation | B5 (E60) |
| Type (Engine) | 4.4 V8 (500 Hp) Switch-Tronic |
| Start of production | 2005 |
| End of production | 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 18.6 l/100 km (12.6 US mpg, 15.2 UK mpg, 5.4 km/l) |
| Fuel consumption (economy) – extra urban | 8.7 l/100 km (27 US mpg, 32.5 UK mpg, 11.5 km/l) |
| Fuel consumption (economy) – combined | 12.3 l/100 km (19.1 US mpg, 23 UK mpg, 8.1 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.7 sec |
| Acceleration 0 – 62 mph | 4.7 sec |
| Acceleration 0 – 60 mph | 4.5 sec |
| Maximum speed | 314 km/h (195.11 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 3.4 kg/Hp, 290.7 Hp/tonne |
| Weight-to-torque ratio | 2.5 kg/Nm, 407 Nm/tonne |
| Power | 500 Hp @ 5500 rpm |
| Power per litre | 113.7 Hp/l |
| Torque | 700 Nm @ 4250 rpm (516.29 lb.-ft. @ 4250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | H1 |
| Engine displacement | 4398 cm3 (268.38 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 92 mm (3.62 in.) |
| Piston Stroke | 82.7 mm (3.26 in.) |
| Compression ratio | 9:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Supercharger, Intercooler |
| Valvetrain | DOHC |
| Kerb Weight | 1720 kg (3791.95 lbs.) |
| Max. weight | 2260 kg (4982.45 lbs.) |
| Max load | 540 kg (1190.5 lbs.) |
| Trunk (boot) space – maximum | 520 l (18.36 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| Length | 4841 mm (190.59 in.) |
| Width | 1846 mm (72.68 in.) |
| Height | 1468 mm (57.8 in.) |
| Wheelbase | 2888 mm (113.7 in.) |
| Front track | 1566 mm (61.65 in.) |
| Rear (Back) track | 1574 mm (61.97 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, automatic transmission |
| Front suspension | Spring Strut, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 245/35 R20Rear wheel tires: 285/30 R20 |
Powertrain & Engine Architecture
At the heart of the B5 4.4 V8 (500 Hp) Switch-Tronic lies the Alpina-modified version of BMW’s N62 V8 engine. Designated as the H1 engine code by Alpina, this 4.4-liter naturally aspirated V8 benefited from significant enhancements over the standard N62. These included a revised cylinder head design, high-compression pistons, a more aggressive camshaft profile, and a larger intake manifold. Crucially, Alpina added a mechanically driven supercharger, boosting power output to 500 horsepower and 700 Nm (516 lb-ft) of torque. The engine utilized multi-port fuel injection and double VANOS (variable valve timing) for both intake and exhaust valves. The “Switch-Tronic” transmission was a heavily modified ZF 6HP26 automatic transmission, featuring enhanced shift logic and the ability for the driver to manually select gears via steering wheel-mounted paddles. This transmission was specifically tuned to handle the increased power and torque output of the supercharged V8.
Driving Characteristics
The B5 4.4 V8 (500 Hp) Switch-Tronic delivered a markedly different driving experience compared to the standard 5 Series or even other B5 variants. The supercharger provided instant throttle response and a broad, flat torque curve, resulting in effortless acceleration in any gear. The 0-60 mph sprint was dispatched in approximately 4.5 seconds, and the car could reach a top speed of 314 km/h (195 mph). While the automatic transmission wasn’t as engaging as a manual gearbox, the Switch-Tronic system allowed for precise gear selection, enhancing driver control. The suspension, tuned for both comfort and performance, provided a stable and composed ride, even at high speeds. Compared to the naturally aspirated 5 Series models, the B5 offered a significantly more potent and refined driving experience. Against the higher-output B5 variants with larger displacement engines, the 4.4L offered a more accessible power delivery and a slightly lighter overall feel.
Equipment & Trim Levels
The B5 4.4 V8 (500 Hp) Switch-Tronic came standard with a comprehensive list of luxury and performance features. Interior appointments included premium leather upholstery, wood trim, and Alpina-specific instrumentation. Standard equipment also included a sunroof, navigation system, premium sound system, and automatic climate control. Optional extras included upgraded leather options, individual rear seats, and a variety of cosmetic enhancements. Alpina offered a high degree of customization, allowing customers to tailor the B5 to their specific preferences. The exterior was distinguished by Alpina-specific aerodynamic enhancements, including a front spoiler, rear spoiler, and unique alloy wheels.
Chassis & Braking
The B5 (E60) utilized the standard BMW 5 Series chassis, but with Alpina-specific modifications to enhance handling and stability. The suspension was recalibrated with stiffer springs and dampers, and thicker stabilizer bars were fitted. The braking system featured ventilated discs on all four wheels, providing ample stopping power. The ABS (Anti-lock braking system) was standard, ensuring safe and controlled braking in all conditions. The steering was a hydraulic rack-and-pinion system, offering precise and responsive steering feel. The B5 4.4 V8 (500 Hp) Switch-Tronic was equipped with 245/35 R20 tires on the front and 285/30 R20 tires on the rear, providing excellent grip and traction.
Market Reception & Comparison
The Alpina B5 (E60) 4.4 V8 (500 Hp) Switch-Tronic was generally well-received by automotive critics. Reviewers praised its blend of luxury, performance, and exclusivity. The supercharged V8 engine was lauded for its smooth power delivery and impressive acceleration. The Switch-Tronic transmission was also commended for its responsiveness and ease of use. Fuel economy, however, was a common criticism, with the B5 consuming a significant amount of fuel, especially in urban driving. Compared to other trims in the B5 lineup, the 4.4L offered a compelling balance of performance and price. It was more affordable than the larger-displacement V8 models, while still providing a substantial performance upgrade over the six-cylinder variants.
Legacy
The Alpina B5 (E60) 4.4 V8 (500 Hp) Switch-Tronic remains a sought-after vehicle among enthusiasts. The H1 engine, while complex, has proven to be relatively reliable when properly maintained. Common issues include oil leaks and occasional supercharger maintenance. Today, the B5 represents a unique and desirable alternative to the standard BMW 5 Series, offering a rare combination of performance, luxury, and exclusivity. Its value in the used car market has remained relatively stable, reflecting its enduring appeal and limited production numbers. The B5 (E60) solidified Alpina’s reputation as a builder of high-performance, hand-built automobiles, and continues to be celebrated as a benchmark in the high-performance sedan segment.
