BMW/ALPINA B7 BITURBO

BMW/ALPINA B7 BITURBO AWD

DOWNLOAD PDF

The B7 Bi-Turbo is based on the 750Li and uses a modified version of its 4.4-litre twin-turbocharged V8 engine designated the N63M30. The engine is modified by the addition of modified twin scroll turbochargers having larger inlet and outer dimensions and new compressors for an increased boost pressure of 1.4 bar, replacement of the standard pistons with high strength MAHLE pistons, new NGK spark plugs, a new air-to-water intercooler making use of short charge air intake paths to feed air to the air intake manifold, a revised cooling system with large diameter hoses for uninterrupted flow and additional external water and oil coolers. These modifications allow the engine to generate a power output of 608 PS (447 kW; 600 hp) at 6,250 rpm and 800 N⋅m (590 lb⋅ft) of torque between 3,000 and 5,000 rpm. 670 N⋅m (494 lb⋅ft) of torque is achieved at 2,000 rpm. The engine has a compression ratio of 10.0:1.

The B7 Bi-Turbo has a specially developed stainless steel exhaust system with quad round exhaust tips and electronically controlled bypass valves controlled by the Driving Dynamic Control knob near the gear selector.

The B7 Bi-Turbo uses the same ZF 8-speed automatic transmission as used on a standard 750i but has a reprogrammed Alpina software for faster shift times. The transmission also has a reinforced torque converter, an extra oil cooler and planetary wheels. The shift paddles are however replaced by shift buttons behind the steering wheel but the car can be ordered with the shift paddles as well.

The B7 Bi-Turbo is available in all-wheel-drive drivetrain. Alpina has recalibrated the xDrive system used in the 750i especially the air suspension system which can be controlled using the Dynamic Control knob. The suspension now has Active Comfort Drive with Road Preview, Active Roll Stabilisation and Integral active Steering on the rear axle. The all-wheel-drive system has a heavy bias towards the rear-wheels.

Integral Active Steering has a variable ratio electric steering system on the front axle and the active steering on the rear axle. The system works by steering the rear wheels opposite to the front axle for better turn in at low speeds and turning the rear wheels in unison with the front wheels at high speeds for better stability.

The calibrated air suspension lowers the car by 20 mm (1 in) at speeds above 225 km/h (140 mph) for improved performance. The suspension can also be lowered manually by the same height at low speeds or can be raised for ground clearance by 20 mm (1 in). The car has two new driving modes, Comfort + and the Sport + with the latter enabling the car to give maximum performance.

The multi-spoke alloy wheels on the car measure 20×8.5-inch at the front and 20×10-inch at the rear wrapped in Michelin Pilot Super Sport tyres. 21-inch forged multi-spoke alloy wheels and tyres are available as an option, the use of conventional tyres over run flats is claimed to save 2.5 kg (5.5 lb) of unsprung weight per wheel (2.5 kg (5.5 lb)) from the wheel 2 kg (4.4 lb) from the tyre). The brake discs measure 395 mm (16 in) at the front and 370 mm (15 in) at the rear. The callipers are four piston fixed units at the front and two piston floating units at the rear finished in Alpina Blue paint. The brakes are supplied by Brembo.

The interior of the car is upholstered in Lavalina leather or Tartufo leather upholstery and is finished in a customer specific colour. Several options are available for the interior trim, including the Alpina specific Piano black or Myrtle wood. A metal production plaque located on the centre console has the founder’s signature and the car’s production number. The interior also comes with floor mats having the Alpina logo, Alpina kickplates and illuminated Alpina door sills. The digital instrument cluster is a bespoke unit especially developed for the B7 with changing displays depending on the selected driving mode. Other creature comforts are the same as offered on the 750i.

The exterior changes apart from the wheels include a front chin spoiler and a rear lip spoiler, integrated brake cooling ducts in the front bumper and recalibrated active grille shutters in the twin kidney grille. The B7 is available in Alpina Blue Metallic and Alpina Green Metallic exterior colours along with exterior colours offered by BMW.

DOWNLOAD PDF