Alpina B12 5.7 (E31)

    Description

    The Alpina B12 5.7 was introduced in 1992 and was based on the production BMW 850CSi (E31 body).

    The number of produced Alpina B12 5.7 from November 1992 to December 1996 amounted to 57 units (for reference: BMW 850CSi was produced – 1510 copies).

    Mechanics

    The B12 5.7 model used the Alpina D2 engine, which was a boosted 5.7-liter BMW S70B56 V12 engine with up to 416 hp. With. and torque of 570 N∙m.

    This engine received a modified air intake, a Bosch Motronic M1.7 injection system with a reprogrammed engine control unit, with manually turned valves. The crankshaft was also modified and Schrick camshafts and Mahle forged pistons were installed, while the piston stroke was increased to 81 mm. The exhaust system was designed by Alpina with stainless steel catalytic converters.

    The gearbox was a 6-speed manual gearbox manufactured by Getrag. However, an electronic clutch system called Shift-Tronic by the manufacturer was optional. The system was developed in collaboration with LUK GS and the B12 5.7 was the only Alpina model offered with this system. 32 cars were equipped with the Shift-Tronic system and were badged "Shift-Tronic" on the rear in addition to the normal badging.

    Exterior

    External changes are very minor compared to the BMW 850CSi. A unique carbon fiber hood with engine cooling vents and a NACA center duct was fitted, along with original Alpina Classic alloy wheels.

    Interior

    Anthracite leather with blue contrast stitching was used for the interior, along with wood-trimmed instrument panel and wood shift knob.

    It is worth noting that the base car BMW 850CSi already had electric seats with memory, an electric steering wheel for reach and tilt. And also, for the first time, solutions such as CAN-bus, electronically controlled cable-free throttle assembly, ASC + T – an automatic stability and traction control system that monitors lateral displacements and controls the brakes, and an active steering rear suspension AHK (Aktive Hinterachs-Kinematik ) with electrohydraulic drive.

    Sources

    Bodywork
    Years of production
    1992-1996
    Produced (pcs.)
    57
    Body type
    купе
    Number of doors
    2
    Number of places
    4
    Engine
    Engine type
    бензиновый
    Engine location
    спереди, продольное
    Engine model
    Alpina D2 (BMW S70B56)
    Cylinders
    V12
    V-angle
    60°
    Capacity (cc)
    5646
    Power output (hp / kW /)
    416 /
    306 /
    at rpm
    5400
    Torque (N·m)
    570
    at rpm
    4000
    Bore (mm)
    86,0
    Stroke (mm)
    81,0
    Compression
    10,0
    Number of valves
    2/24
    Valvetrain
    OHC
    Block material
    алюминиевый сплав
    Oil sump capacity (l)
    7,5
    Fuel system
    многоточечный впрыск
    Fuel system model
    Bosch Motronic M1.7
    Turbocharger
    Specific
    Specific output (hp/litre)
    73,68
    Specific output (hp/tonne)
    232,40
    Specific output (kg/hp)
    4,30
    Specific torque (N·m/litre)
    100,96
    Specific torque (N·m/tonne)
    318,44
    Transmission
    Driven wheels
    задний
    Clutch
    однодисковое
    Gearbox model
    Getrag Type 286 + Alpina Shift-Tronic
    Gearbox
    механическая
    Number of speeds
    6
    Final drive ratio
    2,930
    Suspension
    Front suspension
    макферсон
    Rear suspension
    независимая многорычажная
    Elastic elements in front
    пружины
    Elastic elements in rear
    пружины
    Front anti-roll bar
    да
    Rear anti-roll bar
    да
    Wheels brand
    Alpina Classic by Ronal
    Wheel size front
    9J×18
    Wheel size rear
    10,5J×18
    Tyres front
    245/45 R18
    Tyres rear
    285/35 R18
    Steering
    Steering type
    шестерня-рейка
    Power steering
    гидравлический
    Turning diameter (m)
    11,5
    Brakes specs
    Brakes front
    дисковые вентилируемые
    Brakes rear
    дисковые вентилируемые
    Disc material
    чугун
    Number of caliper pistons (front/rear)
    4/1
    Anti-lock braking system
    да
    Dimensions and weight
    Body
    несущий
    Length (mm)
    4780
    Width (mm)
    1855
    Height (mm)
    1330
    Wheelbase (mm)
    2684
    Front track (mm)
    1560
    Rear track (mm)
    1552
    Ground clearance (mm)
    140
    Drag coefficien
    0,290
    Curb weight (kg)
    1790
    Max. weight (kg)
    2260
    Trunk volume max (litre)
    320
    Performance specs
    Fuel consumption combined (l/100 km)
    11,0
    Fuel consumption (ECE) at 90 kph (l/100 km)
    9,3
    Fuel consumption (ECE) at 120 km/h (l/100 km)
    10,9
    Fuel consumption (ECE) city (l/100 km)
    19,9
    Fuel consumption (ECE) combined (l/100 km)
    13,4
    Fuel tank capacity (l)
    90
    Fuel type
    Аи-98
    Dynamic specs
    Acceleration 0-10 kph (s)
    0,5
    Acceleration 0-20 kph (s)
    1,0
    Acceleration 0-30 kph (s)
    1,5
    Acceleration 0-40 kph (s)
    2,0
    Acceleration 0-50 kph (s)
    2,4
    Acceleration 0-60 kph (s)
    2,9
    Acceleration 0-70 kph (s)
    3,5
    Acceleration 0-80 kph (s)
    4,2
    Acceleration 0-90 kph (s)
    4,9
    Acceleration 0-100 kph (s)
    5,8
    Acceleration 0-110 kph (s)
    6,9
    Acceleration 0-120 kph (s)
    8,2
    Acceleration 0-130 kph (s)
    9,7
    Acceleration 0-140 kph (s)
    11,3
    Acceleration 0-150 kph (s)
    12,9
    Acceleration 0-160 kph (s)
    14,4
    Acceleration 0-170 kph (s)
    15,9
    Acceleration 0-180 kph (s)
    17,3
    Acceleration 0-190 kph (s)
    18,4
    Acceleration 0-200 kph (s)
    19,2
    Acceleration 0-10 mph (s)
    0,8
    Acceleration 0-20 mph (s)
    1,6
    Acceleration 0-30 mph (s)
    2,3
    Acceleration 0-40 mph (s)
    3,2
    Acceleration 0-50 mph (s)
    4,2
    Acceleration 0-60 mph (s)
    5,5
    Acceleration 0-70 mph (s)
    7,2
    Acceleration 0-80 mph (s)
    9,5
    Acceleration 0-90 mph (s)
    12,0
    Acceleration 0-100 mph (s)
    14,6
    Acceleration 0-110 mph (s)
    16,9
    Acceleration 0-120 mph (s)
    18,7
    Acceleration 0-92 m (300 feet) (s) /kph/
    6,2 /
    105,0 /
    Acceleration 0-100 m (s) /kph/
    6,5 /
    108,0 /
    Acceleration 0-200 m (s) /kph/
    9,7 /
    142,0 /
    Acceleration 0-201 m (1/8 mile) (s) /kph/
    9,8 /
    142,0 /
    Acceleration 0-300 m (s) /kph/
    12,4 /
    164,0 /
    Acceleration 0-305 m (1000 feet) (s) /kph/
    12,5 /
    164,0 /
    Acceleration 0-400 m (s) /kph/
    14,6 /
    178,0 /
    Acceleration 0-402 m (1/4 mile) (s) /kph/
    14,7 /
    179,0 /
    Acceleration 0-500 m (s) /kph/
    16,6 /
    189,0 /
    Acceleration 0-600 m (s) /kph/
    18,4 /
    197,0 /
    Acceleration 0-610 m (2000 feet) (s) /kph/
    18,6 /
    198,0 /
    Acceleration 0-1000 m (s) /kph/
    24,9 /
    Rolling acceleration 100-200 kph (s)
    13,4
    Top speed (kph)
    300
    Top speed (mph)
    186
    Last modified
    31.07.2023

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