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The new B4 Bi-Turbo Coupé accelerates from 0 to 100km/h (0 – 62mph) in just 4.2 seconds
The ALPINA B4 Coupe makes its world premiere today.
The 2979cc straight-six cylinder engine with high-precision direct injection, Valvetronic and Bi-Turbo charging delivers 410hp (301kW) between 5500rpm and 6250rpm and a maximum torque of 600Nm at only 3000rpm. In fact 550Nm are available across an impressively wide range between 2200rpm and 5200rpm. Mated to the excellent ZF 8-Speed Sport-Automatic transmission means that the new BMW ALPINA B3 Bi-Turbo and B4 Bi-Turbo models are never lacking in forward momentum – power can be called upon at all times in order to enjoy that typical, effortless ALPINA driving experience. The new B4 Bi-Turbo Coupé accelerates from 0 to 100km/h (0 – 62mph) in just 4.2 seconds, passing the 200km/h mark in 14 seconds on the way to a top speed of 305km/h. At the same time the powertrain, which features Valvetronic and Start Stop, boasts class leading economy figures with a combined consumption of only 7.6 litres per 100 kilometers and CO2 emissions of just 177g/km
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TRANSMISSION
Inspired by the pleasure that the 8-Speed Sport-Automatic transmission with SWITCH-TRONIC offers in the larger BMW ALPINA models, the so-called 8HP70 transmission has been extensively adapted to suit the performance characteristics of the new B3 and B4 Bi-Turbo models. In actual fact, the high power output and torque of the Bi-Turbo combine so well with this transmission that performance figures usually associated with much larger but less efficient engines are achieved.
The transmission excels in disciplines often assumed to be incompatible and offers an optimum driving experience in every situation. To this end, three shift modes are available: Automatic (D), Sport (S) and Manual (M). In Automatic (D) Shift Mode the focus is strictly on driving comfort. The transmission changes gears quickly and with no noticeable interruption to the delivery of power. The torque of the engine enables consumption-optimised ΅surfing΅ in high gears even at very low speeds and in urban driving environments. Even at higher cruising speeds rpms will remain low, for example 2500rpm at 170km/h in 8th gear, increasing long-distance driving comfort significantly.
Sport (S) Shift 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 i.e. kick-down will implement multi-simultaneous downshifts and optimal acceleration. When combined with the Sport or Sport+ setting of the Drive Performance Control, which modifies the drive and chassis setup, gearshifts are even quicker.
Activating the Manual (M) Shift Mode using the SWITCH-TRONIC buttons on the back of the steering wheel, allows the driver to take control and shift gears when suitable or necessary. A special feature of the Sport, Sport+ and DSC Off setting is the suppression of automatic up-shift in Manual (M) Shift Mode – hereby the selected gear is held into the rpm limiter and the transmission will not up-shift into a higher gear.
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Chassis & Suspension
The suspension set-up of the new B4 Bi-Turbo provides great ride-quality and comfort while simultaneously offering sharp and dynamic handling. The adaptive ALPINA sport suspension solves this conflict of interest by means of electronically adjustable dampers in collaboration with performance springs, bump stops and stabilisers. The system allows the driver to use the Drive Performance Control (Eco Pro, Comfort, Sport, Sport+) to select the suspension setting and driving dynamics to match his mood.
The longer wheelbase and wider track at the front and rear provide the B4 Bi-Turbo Coupé with a more dynamic character from the outset. Subtle adjustments to camber, toe-in and elastokinematics result in a neutral chassis and very balanced handling. The 20” ALPINA Classic wheels with MICHELIN Pilot Super Sport tyres combined with a front strut brace accentuate the CoupéΆs direct and precise turn-in.
The Variable Sports Steering from BMW, which comes as standard, has a progressive steering rack providing steering stability at high speeds but which requires significantly less steering input (turns of the wheel) when manoeuvring and parking.
Deceleration is taken care of by an 18“ high-performance brake system with 370mm discs at the front and 345mm discs at the rear. Aluminium callipers (4-piston on front axle, 2-piston on rear axle) painted in blue and with ALPINA lettering, in conjunction with high-performance pads, ensure fading stability and optimal pedal feedback.
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Design
Coupés from ALPINA have always appealed to a small but particularly loyal circle of enthusiast drivers who share a passion for understated elegance combined with maximum performance and a sophisticated driving experience. The design of the BMW ALPINA B4 Bi-Turbo Coupé combines muscular and delicate elements in one chic silhouette.
The Coupé is longer, wider and significantly lower than the Saloon. Its profile rakes from an imposing, muscular front accentuated with bold lines to a clean and stylish rear. The front spoiler, with subtle ALPINA lettering, integrates seamlessly into the dynamic front apron which is characterised by large air intakes for the cooling system of the turbo-charged engine as well as the high-performance brake system. Together with the rear spoiler the CoupéΆs aerodynamics are optimised for excellent high-speed stability while simultaneously maintaining a low drag coefficient.
It is almost as if the low, elongated silhouette of the Coupé was shaped to complement the 20” ALPINA Classic wheels. Their timeless, twenty spoke design with hidden air valves suit the B4 Bi-Turbo exceptionally well. Blue brake callipers with ALPINA lettering and signature twin tailpipes complete the appearance.
B4 BITURBO Coupé SWITCH-TRONIC
Dimensions
Length (mm) 4640
Width (mm) 1825
Height, unladen (mm) 1373
Wheelbase (mm) 2810
Track, front (mm) 1552
Track, rear (mm) 1576
Luggage capacity (l) 445
Fuel tank capacity (l) ca. 60
Weight
Unladen (kg) 1615
Max permissible (kg) 2135
Permitted load (kg) 520
Max axle load, front (kg) 1030
Max axle load, rear (kg) 1150
Max trailer load, braked (kg) 1700
Max trailer load, unbraked (kg) 750
Engine
Cylinders 6 in line
Capacity (cc) 2979
Bore (mm) 84.0
Stroke (mm) 89.6
Compression ratio (:1) 10.2
Max output (kW / hp / 1/min) 301 / 410 / 5500-6250
Max torque (Nm / 1/min) 600 / 3000-4000
Engine management BOSCH MEVD 17.2.6
Fuel type Super Plus
Emissions classification Euro 6
Transmission
8-Speed Sport-Automatic ZF 8HP70 SWITCH-TRONIC
1st 4.71
2nd 3.14
3rd 2.11
4th 1.67
5th 1.29
6th 1.00
7th 0.84
8th 0.67
Final drive ratio 2.81
Performance
Acceleration 0-100km/h (s) 4.2
Top speed (km/h) 305
Fuel consumption *
Urban (l/100km) 10.2
Extra-urban (l/100km) 6.1
Combined (l/100km) 7.6
CO² emissions (g/km) 177
Efficiency category D
Wheels and tyres
Standard wheels and tyres ALPINA CLASSIC 20″
Front 8 x 20 245/30 ZR20
Rear 9 x 20 265/30 ZR20
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