The foundation that Burkard Bovensiepen laid in the 1960s in the form of a performance-enhanced BMW 1500, has since developed into a permanent fixture in the luxury sports car §egmènt. What were then the first technologically advanced products marketed by ALPINA, namely four-cylinder petrol engines wîth Weber dual carburettors, are now in modern form high-tech automobiles. Equipped from the outset wîth the best possible genes by BMW, they represent the ultimate in performance, comfort, driving culture and efficiency.
The new BMW ALPINA B4 S Bi-Turbo models combine these characteristics like no other and stand out from the crowd wîth their dynamic styling paired wîth a modest elegance. The revised straight-six 3.0 litre engine now delivers even more power and ensures thrilling performance. The adaptive ALPINA sport suspension and the revamped 8-Speed Sport-Automatic transmission wîth ALPINA SWITCH-TRONIC deliver impressive dynamics and maximum comfort.
The new BMW ALPINA B4 S Bi-Turbo receives subtle design changes as part of the latest model update, including new front and rear aprons wîth chrome accents. New LED head- and fog lights, now standard, ensure maximum road illumination for improved safety and lend the new BMW ALPINA B4 S Bi-Turbo a distinctive, powerful appearance. A newly designed tail-light cluster, now also in LED technology, rounds-off the package. Superior material quality and refined interior control elements go hand-in-hand wîth an extended standard equipment level which now includes split-folding rear seats and ConnectedDrive Services for better connectivity.Coupe
The design of the BMW ALPINA B4 S Bi-Turbo Coupe combines muscular and delicate elements in one chic silhouette. Its profile rakes from an imposing, muscular front accentuated wîth bold lines to a clean and stylish rear. The BMW ALPINA B4 S Bi-Turbo Coupe produces 324 kW (440 hp) and a maximum torque of 660 Nm, enabling the Coupe to accelerate from 0 to 100 km/h in just 4.2 seconds (3.9 seconds wîth all-wheel drive), reaching a top speed of 306 km/h (303 km/h wîth all-wheel drive). At the same time it is capable of economical cruising wîth a combined fuel consumption according to the ECE norm of just 7.9 - 8.3 l/100 km and 180 - 190 g/km CO2. This exceptional performance is also available wîth all-wheel drive based on the BMW xDrive system which offers maximum traction and dynamics in all conditions.Convertible
The visual appearance of the B4 S Bi-Turbo Convertible is defined by short overhangs, muscular shoulders ending in a powerful rear end, and the characteristic BMW metal folding roof. The sporty and powerful design of the front spoiler features functional air intakes and forms a perfect aerodynamic match wîth the discreet rear spoiler. The soundtrack of the smooth 3-litre straight-six cylinder engine wîth twin turbochargers is best enjoyed wîth the roof down. It produces 324 kW (440 hp) and a maximum torque of 660 Nm which is sent to the rear wheels via an 8-speed sport automatic transmission. (posted on conceptcarz.com)
The BMW ALPINA B4 S Bi-Turbo Convertible accelerates from 0 to 100 km/h in just 4.3 seconds, reaching a top speed of 304 km/h. The combined fuel consumption according to the ECE norm is just 8.3 l/100 km and 190 g/km CO2.
Engine : 3.0 L., 6-cylinder
Power: 440 hp
Torque: 487 ft-lbs
The output of the 3.0 litre straight-six cylinder engine wîth high-precision direct injection and Valvetronic has been further increased wîth the aid of a revised turbocharging system comprising two new ALPINA specific turbochargers and a new high-performance cooling system. The new BMW ALPINA B4 S Bi-Turbo now delivers 324 kW (440 hp) between 5500 rpm and 6250 rpm and a maximum torque of 660 Nm from 3000 rpm to 4500 rpm.
The new engine particularly impresses in the mid-range wîth an effortless power delivery in addition to an eager willingness to rev to 7000 rpm. Coupled to the excellent ZF 8-Speed Sport-Automatic Transmission it propels the new BMW ALPINA B4 S Bi-Turbo Coupe in just 4.2 seconds (3.9 seconds wîth all-wheel drive) from 0 to 100 km/h and on to a top speed of 306 km/h (303 km/h wîth all-wheel drive). BMW Efficient Dynamics technologies such as Auto Start Stop and Sailing contribute to an exemplary fuel consumption of only 7.9 - 8.3 l/100 km and 180 - 190 g/km CO2 combined measured to ECE norm (depending on the model).
To achieve the new BMW ALPINA B4 S Bi-Turbo's characteristic, torque driven and spontaneous power delivery without sacrificing fuel efficiency necessitates state-of-the-art engine technology in a clever package. The application of Bi-Turbo charging provides excellent throttle response and pick-up due to the low mass inertia of smaller turbocharger running gear while generating sufficient throughput for top-end performance. The design and construction of the excellent BMW 3.0 litre straight-six cylinder (N55) engine serves as a starting-point for a specially cast aluminium crankcase wîth reinforced bed plate and Bi-Turbo capable flanges. The latter facilitate the mounting of two turbochargers along wîth their oil and water feeds and a close-coupled catalytic converter arrangement.
This latest iteration of the 3.0 litre straight-six cylinder engine receives new ALPINA specific turbochargers for even more output and a new piston crown cooling system. ALPINA air intake ducts guide the air wîth minimal losses from the air intake via the air filter housing to the turbochargers. A high-capacity intercooler wîth optimised collector boxes made from aluminium allows the full exploitation of the engine's output potential. The high-performance cooling system has been further adapted concordant to the latest increase in engine output – the external water cooler and external oil cooler have grown in capacity by more than 15 % and 35 % respectively.Transmission
The 8-speed sport automatic transmission has been explicitly adapted in cooperation wîth ZF for the requirements of BMW ALPINA automobiles and offers exemplary shift comfort wîth a pronounced sporty characteristic.
The adapted mechatronics and a special torque converter ensure that the high power output is transmitted wîth maximum efficiency and comfort to the driven wheels.
ALPINA SWITCH-TRONIC is not just the description for the traditional shift buttons on the back of the §teering wheel, but also means that the transmission software is explicitly tailored for every drivetrain type.
The 8-speed sport automatic transmission combined wîth ALPINA typical high torque output at low engine speeds allows effortless, relaxed and economical driving in high gears and outstanding cruising comfort on long journeys. Simultaneously the hardware design of the transmission does not require any significant reduction in torque when changing gear and allows for impressively dynamic and very fast gear changes under full load. As such the transmission plays a crucial role in facilitating very quick acceleration during dynamic driving but also plays an important part in reducing fuel consumption thanks to BMW Efficient Dynamics Technologies such as the ECO PRO mode as well as the Auto Start Stop function.Transmission - Modes
Automatic Mode is configured wîth a clear focus on driving comfort. In this mode gear shifts are performed rapidly and smoothly, without any noticeable interruption in power delivery and in perfect harmony wîth the powerful, high-torque engines.
The now even more dynamic Sport Mode noticeably shortens the time it takes for the next gear to engage and depending on engine load significantly moves the shift points up the rev range. Accelerator inputs are carried out immediately, full throttle respectively kick-down will implement multi-simultaneous downshifts and optimal acceleration.
In Manual Mode all relevant parameters are configured for pronounced dynamics and gear changes are performed exclusively using the shift buttons on the rear of the §teering wheel. In this mode gear changes are super fast and take just a fraction of second. The currently selected gear is displayed in the instrument cluster. Automatic upshifts can be suppressed in combination wîth the Dynamic Performance Control setting Sport+ or DSC Off.
Chassis & Suspension
The ALPINA driving experience is unique - perhaps best characterised by effortlessness and powerful confidence. The intelligent suspension and chassis set-up plays a pivotal role in this by allowing high, perceptible comfort combined wîth outstanding driving dynamics and neutral handling. This is the oft-cited driving comfort 'made by' ALPINA.
The adaptive ALPINA sports suspension combines electronically adjustable dampers wîth springs, auxiliary springs and anti-roll bars. Independent of the active dampers continuously adapting to the current driving conditions, the driver can also noticeably adjust the suspension and overall driving dynamics towards a more comfort or sport orientated setup. Dynamic
Camber and toe-in settings adapted to the model-specific wheel and tyre combination, subtle elastokinematic measures and the maximum rim size ensure high directional stability, precise §teering and agile handling. The iconic ALPINA CLASSIC 20' wheels are equipped wîth MICHELIN Pilot Sport 4 S summer tyres. These high-performance tyres, which are specifically matched to the respective car, are benchmark in the categories: traction, wet and dry grip and durability. The tyres on all BMW ALPINA automobiles forego run-flat technology in favour of enhanced ride comfort.
The Dynamic Performance Control button, which is used to select the different modes of the electronically adjustable dampers, also controls other parameters and features that influence driving dynamics. Depending on the equipment specifications of the particular model, this may include for example active roll stabilisation, power §teering, torque distribution (all-wheel drive only) and even the driving stability control systems – the latter which are programmed wîth a noticeably sport-oriented setup.Limited-Slip Differential
The mechanical limited-slip differential improves traction when driving very dynamically and inhibits wheel spin by distributing torque to the wheel wîth more grip. This situation may arise for example when a wheel becomes unloaded during cornering or during acceleration when the driven wheels are on surfaces wîth high differences in grip. When negotiating tight corners in a spirited fashion, for example in the mountains or on a circuit, but also in generally wet conditions, undesired wheel spin can occur on the inside rear wheel due to becoming unloaded in combination wîth high engine torque. The limited-slip differential intervenes at an early stage to prevent wheel spin from arising and therefore ensures that there is no loss in traction so that the vehicle can accelerate optimally out of the corner. Overall, the limited-slip differential leads to a significant and perceptible increase in driving dynamics, much to the delight of particularly sporty drivers. The hardware itself consists of a torque-sensing differential of motor sports quality developed in cooperation wîth the company Drexler. It is assembled by hand wîth precision-forged gear wheels and a CNC-milled housing.Safety
A BMW ALPINA offers a high degree of comfort and sportiness as well as neutral handling, which ensures stability and a high-degree of safety even when driving at higher speeds.
The electronic driving stability control systems are specifically configured for each specific BMW ALPINA model, taking into account a plethora of influencing parameters, in order to ensure that the high power and torque are transferred to the road safely and effectively.
The influence of the aerodynamic properties of a vehicle on driving stability is of particular importance, especially at higher speeds. Based on the principle 'Form Follows Function', the aerodynamic components such as the front and rear spoilers are specifically designed to work together in order to achieve the maximum possible reduction in lift and thus ensure very neutral handling.
The brake system has the task of decelerating the vehicle safely and comfortably from high speeds. Generously dimensioned wîth maximum utilisation of the brake surface and equipped wîth excellent ventilation, the brake system in every BMW ALPINA provides outstanding deceleration performance.Source - BMW