2015 Alpina B4 Bi-Turbo

The new BMW ALPINA B4 BITURBO Convertible

The ALPINA philosophy rests on a number of central pillars including effortless performance, abundance of torque, smooth automatic transmissions, an emotional soundtrack and precisely tuned suspensions. This in summary sophisticated driving experience with a sporty touch is perfectly suited for elegant convertibles where an open roof amplifies all sensations. Hence it is not without reason, that BMW ALPINA Convertibles based on the BMW 3 Series have a small and particularly loyal group of enthusiastic owners who share a passion. The new B4 Bi-Turbo Convertible carries on this legacy with its impressive performance, driving dynamics and elegant silhouette.

The BMW ALPINA B4 BITÚRBO
The new BMW ALPINA B4 Bi-Turbo models combine these characteristics like no other. The modern straight-six 3 litre engine equipped with two turbochargers produces 301 kW (410 hp) and a maximum torque of 600 Nm. The adaptive ALPINA sport suspension and the 8-Speed Sport-Automatic Transmission with ALPINA SWITCH-TRONIC deliver maximum comfort and impressive dynamics. Functional aerodynamics, signature 20' ALPINA CLASSIC wheels and two elliptical double tailpipes are hallmarks of the ALPINA design philosophy.

The perfect interaction of power, torque and high-tech transmission impresses with phenomenal acceleration and a top speed in excess of 300 km/h while simultaneously allowing for relaxed long-distance cruising. All the time a real life consumption of below 10 l per 100/km is easily achievable – in fact the new B4 Bi-Turbo Coupé achieves a class-leading combined fuel economy of just 7.6 l/100 km and 177 g/km CO2.

These extraordinary performance figures are also available for customers wishing all-wheel drive. The BMW ALPINA B4 Bi-Turbo Coupé is available with the excellent BMW xDrive system which offers unparalleled levels of traction and driving dynamics.

Powertrain

The B4 Bi-Turbo Convertible accelerates in 4.5 seconds, the B4 Bi-Turbo Coupé All-Wheel Drive in just 4.0 seconds from 0 to 100 km/h on their way to a top speed in excess of 300 km7h. The B4 Bi-Turbo Coupé passes the 200 km/h mark in only 14.1 seconds. The drivetrain, equipped with Auto Start Stop and Valvetronic, also impresses with class-leading economy figures of just 7.6 (8.0) litres per 100 km and 177 (186) g/km of CO2 measured according to ECE Norm.

The stainless steel exhaust system which was developed in collaboration with Akrapovič is 7.5 kg lighter in comparison to its predecessor. The resonant, sporty sound of the exhaust system is controlled by an intelligent exhaust valve. This offers the driver the possibility to influence the sound experience via the Drive Experience Control button and facilitates the balancing act between emotional soundtrack and long-distance comfort.

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 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 370 mm discs at the front and 345 mm 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.

The new BMW ALPINA B4 Bi-Turbo Convertible


The design of the B4 Bi-Turbo Convertible is characterized by short overhangs, precise, long-drawn-shoulder lines, a wide rear and the characteristic metal folding roof. The sporty and purposeful design of the front spoiler is dictated by functional air intakes and operates in conjunction with the modest rear spoiler to improve stability at high speeds. When the roof is open the B4 Bi-Turbo Convertible stands out with its sleek, clean look. The ALPINA CLASSIC 20' light alloy wheels fit seamlessly into the overall shape of the Convertible and lend it a particularly elegant presence.

It only takes 20 seconds and the press of a button to close the roof, which is possible up to a speed of 18 km/h, turning the Convertible into a winter- and weather-proof two-door. The shape of the roof line when closed differs from the B4 Bi-Turbo Coupé significantly due to the steeper rake of the rear windscreen, the flat boot lid and subtle rear spoiler – this gives the Convertible a very distinctive and stand-alone appearance.

The BMW ALPINA B4 Bi-Turbo Coupé


The design of the 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, the transmission and the high-performance fixed-calliper brake system. Together with the rear spoiler the Coupé's 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.

The new B4 Bi-Turbo models come with an extensive list of standard equipment, including leather upholstery, electrically adjustable heated sports seats, automatic climate control, xenon headlights, rain sensor and cruise control. The interior is dominated by refined materials and offers an exclusive ambiance. The door sills, floor mats, emblems in the seatbacks, instrumentation and a hand-stitched sport steering wheel in the finest LAVALINA leather make discreet references to the car's exclusive origins.

Virtually no limits are placed on the individual design of a BMW ALPINA. From the paintwork to the interior trims and the colour of the upholstery – everything offered by the extensive BMW and ALPINA equipment range is available. Seldom does a BMW ALPINA leave the plant in Buchloe without making use of the virtually limitless personalisation options offered by the ALPINA factory. Our philosophy dictates that the customer can design his or her own entirely individual interior – assembled by skilled craftsmen in our leather workshop.

Source - Alpina