Fiat 124 Abarth Rally group 4 (1973)
 Source |
Development chain 1967: Fiat 124 Sport Spider 1970: Fiat 124 Sport Spider 1.6 1973: Fiat 124 Abarth Rally 1975: Fiat 124 Abarth Rally 16V |
Specifications
1013 units built
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Fiat twin cam here and here and here
| Group/Class | 4/3 | Homologation number: 635 and 3059 | |
| Years active | 1973 | Homologation start: 1/1/1973 and 1/1/1974 Homologation end: 1/1/1974 and 31/12/1979 |
|
| Engine | |||
|---|---|---|---|
| Type | Fiat Twin Cam (Lambredi), Type 2ACT, 132AC4.000, straight 4cyl, 4 stroke | located front longitudinal | |
| Capacity | 1756 cc | WRC: 1756 cc | |
| Bore x Stroke (mm) | 84.0 x 79.2 | ||
| Compression ratio | 9.8-10.5:1 | ||
| Output power - torgue | 165 - 175 HP / 7200 rpm group 3: 128 HP @ 6200 rpm |
16.5 kgm (162 Nm) / 5200 rpm group 3: 16.2 kgm @ 5200 rpm |
|
| Main bearings | forged steel crankshaft with 5 main bearings 53mm diameter, and 50.8mm big end journal diameter | connecting rod length between centers 136mm, big end bearing tunnel diameter 54mm, aluminium alloy piston with 47.2 mm compression height | |
| Materials | block: cast iron, 91 mm (1-2 and 3-4) and 94 mm (cyl 2-3) bore spacing, 220 mm deck height | cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers | |
| Cams/valves | 2 overhead camshafts (DOHC), belt driven | 2 valves/cyl - 8 valves total. 42.4mm inlet valve diameter, 35.8mm exhaust valve diameter. 32.5o angle between inlet valve axis and vertical, 32.5o angle between exhaust valve axis and vertical. 2 springs per inlet and exhaust valve | |
| Aspiration | natural, 2 x Weber 44 IDF 20 or 21 carburetors | ||
| Ignition | Marelli electronic ignition, firing order 1-3-4-2 | ||
| Cooling system | jacketed watercooled with pump, radiator, 252 mm diameter-4 blades fan and thermostat | 7.5 lt | |
| Lubrication system | dry sump with oil cooler | 4 lt | |
| Transmission | |||
| Type | rear wheel drive | Colotti T132 or CIMA 5-speed gearbox | |
| Gearbox ratios | constant: 1.556/1 (28/18) 1st: 3.667/1 (33/14) 2nd: 2.100/1 (27/20) 3rd: 1.361/1 (21/24) 4th: 1.000/1 5th: 0.881/1 (17/30) R: 3.526/1 (34/15) |
constant: 1.238/1 (26/21) 1st: 2.724/1 (33/15) 2nd: 1.857/1 (27/18) 3rd: 1.351/1 (24/22) 4th: 1.000/1 5th: 0.840/1 (19/28) R: 2.806/1 (34/15) |
|
| Diffrential ratio | 4.3 (43/10), 5.375/1 (43/8), 6.14/1 (43/7) | hypoid spiral bevel gears limited slip rear differential | |
| Clutch | dry single plate, 215mm diameter, group 4: dry double plate 187 mm disc diameter | ||
| Chassis-body | |||
| Type | steel monocoque Fiat 124 CSA chassis with roll-cage. 2 door hardtop coupe bodyshell with extended wheel arches | ||
| Front suspension | double wishbones with coil springs, telescopic gas shock absorbers and longitudinal tie rods | ||
| Rear suspension | McPherson strut with trailing arms & lower transverse radius arms, coil springs, telescopic gas shock absorbers and antiroll bar | ||
| Steering system | worm and roller (no servo) | 2.75 turns lock to lock | |
| Brakes | solid disks all around with 227mm disk diameter, front 1 piston caliper 48 mm diameter, rear 1 piston caliper 34 mm diameter. group 4: Solid disks all around with 256mm disk diameter, front 2 piston calipers 42 mm diameter, rear 2 piston calipers 34 mm diameter. Front ventilated discs 256 mm disc diameter with 2 piston calipers 48 mm piston diameter | dual circuit with servo | |
| Dimensions | |||
| length: 3.915 m (154.13 in) | width: 1.630 m (64.2 in), group 4: +100 mm | height: 1.240 m (48.82 in) | |
| wheelbase: 2.280 m (89.8 in) | front track: 1.413 m (55.6 in) | rear track: 1.400 m (55.1 in) | |
| Rims - tires | 5.5 x 13", 5.5" - 6.5" x 14" | 185/70-13 | |
| Weight | 870 kg | ||
| Weight/power | 5.7 kg/HP | ||
| Fuel tank | 46 lt | ||
| Drag coefficient | 0.45 | ||
Results in WRC
Races
Works team: FIAT
Season
| Entry | Rally event | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Driver Codriver |
Team | M.C | SVE | POR | KEN | MAR | GRE | POL | FIN | A | S.R | USA | RAC Entry list |
TdC | |
| Raffaele Pinto Arnaldo Bernacchini |
works | 7th | susp ens ion | acci dent | susp ens ion | ||||||||||
| Alcide Paganelli Ninni Russo |
works | clutch | head gasket | stee ring | oil pres sure | eng ine | 6th | ||||||||
| Sergio Barbasio Gino Macaluso |
works | gear box | 5th | 10th | |||||||||||
| Björn Waldegård Hans Thorszelius |
works | acci dent | acci dent | 6th | |||||||||||
| Håkan Lindberg Sölve Andreasson |
works | 5th | 4th | 6th | |||||||||||
| Rauno Aaltonen John Davenport |
works | stee ring | 2nd | ||||||||||||
| Achim Warmbold Jean Todt |
works | 1st | 8th | ||||||||||||
| Maurizio Verini Angelo Torriani/ Ninni Russo |
works | 2nd | 19th | ||||||||||||
| Giulio Bisulli Arturo Zanuccoli |
works | 4th | |||||||||||||
| Maurizio Resemini Carlo Superti |
dnf | ||||||||||||||
| Luís Netto Manuel Coentro |
Torralta Fiat | 4th | |||||||||||||
| Mário Figueiredo Carlos Barata |
Torralta Fiat | acci dent | |||||||||||||
| José Carpinteiro Albino F. Albino |
Torralta Fiat | diff eren tial | |||||||||||||
| Fulvio Bacchelli Francesco Rossetti |
tran smis sion | ||||||||||||||
| 'Didi' Alain Lopes |
? | ||||||||||||||
| Angelo Corio Emilio Corio |
dnf | ||||||||||||||
| Total points () |
84 | 4 | 6 | 7 | 5 | 16 | 10 | 3 | 5 | 27 | 1 | ||||
| Statistics | |||||||||||||||
| Others starts/finishes | 33/15 | 5/1 | 1/1 | 6/1 | 2/1 | 3/2 | 2/1 | 1/1 | 3/1 | 6/4 | 3/2 | 1/0 | |||
SourceMarku Alen in Portugal rally 1974
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Drawings
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Engine
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page revision: 160, last edited: 31 Jan 2019 19:25