Austin MG Metro Turbo group A (1983)
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Home » Rally Cars » Austin MG Metro Turbo
sx1.jpg Development level
Group B
Group A
Production

VIN plates

Specifications

Group/Class A/7 (1983-1987),
A/8 (1988+)
Homologation number: A5107
Years active Homologation start: 1/2/1983
Homologation end: 31/12/1992
Engine
Type A+ series, code 12HD26, straight 4cyl, 4 stroke located front transverse
Capacity 1275 cc WRC: x1.4 = 1785 cc (1983-1987)
x 1.7 = 2168 cc (1988+)
Bore x Stroke (mm) 70.62 x 81.30
Compression ratio 9.4:1
Output power - torgue 170 - 190 HP / 7200 rpm
Main bearings forged steel crankshaft with 3 main bearings 44.45mm journal diameter connecting rod length between centers 146.05mm. Big end bearing: 48.15mm tunnel diameter x 26.9mm width. Gudgeon pin 20.6mm diameter
Materials block: cast iron with dry steel cylinder liners, 226mm deck height 12G940 cylinderhead: reverse flow cast iron with hemispherical shape combustion chambers and vertical valves
Cams/valves side camshaft with overhead valves (OHV), chain driven 2 valves/cyl. - 8 valves total. 35.9mm inlet valve diameter, 30.6mm exhaust valve diameter. 0o angle between inlet and exhaust valve axis and vertical. 2 homocentric coil spring per inlet and exhaust valve
Aspiration 1 x Garret T3 turbocharger with 11 blades nickel alloy turbine 48.7/58.9mm in/out diameter, 12 blades aluminium alloy compressor 40.3/60mm in/out diameter, SU HIF44 carburetor pressure: 1.1 bar
Ignition electronic, firing order 1-3-4-2
Cooling system watercooled 4.9 lt
Lubrication system dry sump 4.8 lt
Transmission
Type front wheel drive 4 speed manual gearbox, located under the engine
Gearbox ratios constant: 1.76/1 (30/17)
1st: 3.647/1 (31/15)
2nd: 2.185/1 (26/21)
3rd: 1.425/1 (21/26)
4th: 1.000/1
R: 3.667/1 (33/18 x 17/15)
constant: 1.045/1 (23/22)
1st: 2.313/1 (31/14)
2nd: 1.567/1 (27/18)
3rd: 1.187/1 (25/22) or 1984: 1.194/1 (24/21)
4th: 1.000/1
R: 2.184/1 (31/18 x 17/14)
Diffrential ratio 3.20/1 (61/19), 3.47/1 (52/15), 3.67/1 (55/15)
1/1 ratio for transfer box
helical gears limited slip 80% front differential
Clutch dry single disk, 181mm diameter
Chassis-body
Type steel monocoque with roll-cage. 3 door hatchback bodyshell
Front suspension bottom link braced by anti roll bar, top link operating Hydragas spring or coil spring and telescopic gas shock absorbers
Rear suspension trailing arm with Hydragas spring or coil spring, telescopic gas shock absorbers and adjustable anti roll bar
Steering system rack and pinion (no servo) 19.9/1 ratio, 2.25 turns lock to lock
Brakes front: ventilated disks 213mm diameter with four piston calipers 36mm diameter, or ventilated disks 254/280/304mm diameter with four piston calipers 38/40mm diameter
rear: drums 178mm diameter with 1 double piston caliper 17.5mm diameter, or solid or ventilated disks 203/254mm diameter with 1 piston caliper 40.5mm diameter
dual circuit with Girling vacuum servo, adjustable ratio split front to rear
Dimensions
length: 3.403 m (134.0") width: 1.619 m (63.7") height: 1.378 m (54.3")
wheelbase: 2.251 m (88.6") front track: 1.312 m (51.6") rear track: 1.286 m (50.6")
Rims - tires front: 7 1/2" x 13" or 15"
back: 8" x 13" or 15"
Weight 860 kg
Fuel tank 32 lt
Drag coefficient 0.39

Results in WRC

Statistics

1987 1988 1989 Total
Total WRC results
Races 1 1 2
Entries/finishes 1/0 1/0 2/0 (0%)

Races

Season
Entry Rally event
Driver
Codriver
Team MC SVE
Entry list
POR KEN TdC GRE Oly (NZ) ARG FIN (CdI) SR RAC
J. Margaronis
C. Zikos
dnf
Statistics
Others starts/finishes 1/0 1/0

Article from 4Τ 199, 4/1987

Click here

1989_MG_Metro_Turbo_1.3_Front.jpg Source
mg-metro-engine-block.jpg Source

Drawings

Engine

A+ engine 1275cc without turbo
aseries4.jpg Source

Transmission

gearbox1.jpg Source
mg-metro-front-brake.jpg Source
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