Citroen BX 4TC group B (1986)
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Home » Rally Cars » Citroen BX 4TC

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On board: special stage in Swedish rally 1986 with Andrue: see video
Technical details: see video


Specifications

Registration numbers
Group/Class B/12 Homologation number: B 279 (01/01 ET)
Years active 1986 Homologation start: 1/1/1986
Engine
Type Simca type 180 N9TE, straight 4cyl, 4 stroke, petrol engine located front longitudinal with 15o right inclination
Capacity 2141.5 cc WRC: x 1.4 = 2998 cc
Bore x Stroke (mm) 91.4 x 81.6
Compression ratio 7.0:1
Output power - torgue 380 HP / 7000 rpm 46.9 kgm (460Nm) / 5500 rpm
Main bearings 5 of 57mm diameter connecting rod length between centers 137mm, big end bearing diameter 55.9mm
Materials block: cast iron cylinderhead: aluminium alloy
Cams/valves 2 overhead camshafts (DOHC), chain driven 2 valves/cyl. - 8 valves total. 46.2mm inlet valve diameter, 41.2mm exhaust valve diameter
Aspiration KKK K26 turbocharger (nickel alloy turbine 64.4mm diameter, aluminium compressor 76mm diameter) with air/air intercooler, Bosch K-jetronic multipoint mechanical fuel injection pressure: 1.25 bar
Ignition electronic, firing order 1-3-4-2
Cooling system watercooled 9.5 lt
Lubrication system dry sump with oil cooler located below rear airofoil lt
Transmission
Type four wheel drive citroen SM-C35 5 speed gearbox
Gearbox ratios constant: 1.000/1 (24/24),
1st: 2.923/1 (38/13)
2nd: 1.941/1 (33/17)
3rd: 1.321/1 (37/18)
4th: 0.969/1 (32/33)
5th: 0.756/1 (28/37)
R: 3.153/1 (41/13)
constant: 1.000/1 (24/24),
1st: 2.500/1 (35/14)
2nd: 1.777/1 (32/18)
3rd: 1.381/1 (29/21)
4th: 1.130/1 (26/23)
5th: 0.96/1 (24/25)
R: 3.153/1 (41/13)
constant: 1.000/1 (24/24),
1st: 3.307/1 (43/13)
2nd: 2.250/1 (36/16)
3rd: 1.631/1 (31/19)
4th: 1.227/1 (27/22)
5th: 0.96/1 (24/25)
R: 3.153/1 (41/13)
Diffrential ratio 3.889/1 (35/9), 4.375/1 (35/8), 4.857/1 (34/7), 4.875/1 (39/8) spiral bevel gears 30% limited slip front differential. Hypoid spiral bevel gears 30% limited slip rear differential. Lock mechanism to rear differential engagement
Clutch dry, double plate disks
Chassis-body
Type steel monocoque chassis with roll cage. 5 door saloon steel/fiber bodyshell with fiber panels, bumpers, doors, bonnets and rear airofoil
Front suspension double wishbones with 1 lower wishbone and 1 upper short transverse arm, hydropneumatic system, and anti roll bar
Rear suspension double wishbones with 1 lower wishbone and 1 upper short transverse arm, hydropneumatic system, and anti roll bar
Steering system rack and pinion with hydraulic power assistance 2.5 turns lock to lock. 14.48/1, 11.16/1
Brakes front and rear ventilated disks 260mm diameter with 4 aluminium piston calipers dual circuit with servo
Dimensions
length: 4.590 m (180.7") width: 1.915 m (75.4") height: 1.380 m (54.3")
wheelbase: 2.612 m (102.8") front track: 1.550 m (61.0") rear track: 1.550 m (61.0")
Rims - tires 150 TR 380FH 210/55x15 VR 390
Weight 1150 kg
Weight/power 3.0 kg/HP
Fuel tank 85 - 110 lt
Drag coefficient 0.38

Results in WRC

Statistics

1986 Total
Total works WRC results
Races /wins 3 3
Entries/finishes 7/1 7/1 (14.3%)
Total points 14 5
(1.667 per race) )
(0.715 per entry)

Races

Works team: Citro├źn Competition
Season
Entry Rally event
Driver
Codriver
Team MC SVE
Entry list
POR KEN TdC GRE NZ ARG FIN (CdI) SR RAC (Oly)
Jean-Claude Andruet
Annick Peuvergne
works acci dent 6th acci dent
Philippe Wambergue
Jean-Bernard Vieu
works suspe nsion engine suspe nsion
Maurice Chomat
Didier Breton
works suspe nsion
Total points
()
5 5
Statistics
Works starts/finishes 7/1 2/0 2/1 3/0

bx_6max.jpg Source
bx_3max.jpg Source
bx_4tcevo_rear.jpg Source
_Citroen_BX_4TC498188fc9fef5.jpg Source

Article ftom 4T 182, 11/1985

Click here
BX-4TC-1.jpg Source
citroenbx_engine.jpg Source

Drawings

unknowncitroenbx4tcwrc1.jpg Source
bx_4tc_transparant.jpg
Street version

Engine

N9TEcutaway.jpg Source
Also used in Peugeot 505 turbo

Transmission

citroen-bx-4x4_xxxx.jpg Source
Rear Torsen type differential not for racing use (top), or rear limited-slip differential (bottom)
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