Lancia Stratos HF group 4 (1974)
 Source |
Development chain 1974: Lancia Stratos HF 1976: Lancia Stratos HF 24V |
Specifications
492 units built
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| Group/Class | 4/4 | Homologation number: 640 | |
| Years active | 1974 - 1975 | Homologation start: 1/10/1974 Homologation end: 31/12/1981 |
|
| Engine | |||
|---|---|---|---|
| Type | Ferrari tipo 236E 829.A, V6 (65o) cyl, 4 stroke, petrol engine | located center transverse | |
| Capacity | 2418 cc, 2444 cc | WRC: 2418 cc, 2444 cc | |
| Bore x Stroke (mm) | 92.5 x 60.0, 93.0 x 60.0 | ||
| Compression ratio | 9.8:1, 14.0:1 | ||
| Output power - torgue | 190 HP @ 7000 rpm 240 - 265 HP @ 7800 rpm |
23 kgm @ 4000 rpm 28 Kgm @ 4500rpm |
|
| Main bearings | forged steel crankshaft with 4 main bearings 63mm diameter, and 43.6 mm big end journal diameter | steel connecting rod length between centers 118mm, 47mm big end bearing tunnel diameter, aluminium alloy pistons with 35mm compression height, (1 compression ring and 1 oil ring) 2 piston rings | |
| Materials | block: cast iron | cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers | |
| Cams/valves | 2 x 2 overhead camshafts (DOHC), double-chain driven | 2 valves per cyl - 12 valves total. 42.5 mm (45mm) inlet valve diameter, 36.8 mm (39mm) exhaust valve diameter. 46o angle between inlet and exhaust valves axes. 2 coil springs per valve | |
| Aspiration | natural, 3 x Weber 40 IDF29, or 3 x Weber 48 IDF carburetors | ||
| Ignition | Marelli distributor with electronic Dinoplex, firing order: 1-4-2-5-3-6, 12V battery, NGK BP8 EVX spark plugs | ||
| Cooling system | jacketed watercooled with pump, radiator, 280 mm diameter-5 blades fan and thermostat | 15 lt | |
| Lubrication system | wet sump | 7 lt | |
| Transmission | |||
| Type | rear wheel drive | Lancia 5 speed manual gearbox | |
| Gearbox ratios | constant: 33/30 (1.100/1) 1st: 3.554/1 (42/13) 2nd: 2.459/1 (38/17) 3rd: 1.781/1 (34/21) 4th: 1.320/1 (30/25) 5th: 0.982/1 (25/28) R: 3.300/1 |
Rally: 1st: 3.143/1 (44/14) 2nd: 2.24/1 (38/17) 3rd: 1.762/1 (37/21) 4th: 1.417/1 (34/24) 5th: 1.154/1 (30/26) R: 3.30/1 |
Pista: 1st: 2.8/1 (48/15) 2nd: 2.053/1 (39/19) 3rd: 1.62/1 (34/21) 4th: 1.32/1 (33/25) 5th: 1.154/1 (30/26) R: 3.30/1 |
| Diffrential ratio | 3.824/1 (65/17), 3.42/1 (65/19) | helical gears limited slip rear differential | |
| Clutch | dry single disc, 228mm diameter | ||
| Chassis-body | |||
| Type | steel monocoque 829 AR chassis with front suspension subframe and rear suspension bridge. 2 door coupe steel bodyshell. Optional extended plastic wheel arches and front/rear spoilers | ||
| Front suspension | double wishbones with upper A wishbone, one lower transferse arm and a lower angled radius arm, coil spring, telescopic shock absorber and anti-roll bar | ||
| Rear suspension | mc pherson strut with one lower transferse arm and a lower angled radius arm, coil spring, telescopic shock absorber and anti-roll bar | ||
| Steering system | rack and pinion (no servo) | 3.3 turns lock to lock | |
| Brakes | front ventilated discs 271mm diameter and 2 piston calipers 48mm diameter. Rear ventilated discs 271mm diameter and 2 piston calipers 38 mm diameter. 1977: front ventilated discs 267mm diameter and 4 piston calipers 44.5mm diameter. Rear ventilated discs 267mm diameter and 4 piston calipers 38.1 mm diameter |
dual circuit (no servo) | |
| Dimensions | |||
| length: 3.710 m (146.1") | width: 1.760 m (69.3") +100 mm | height: 1.110 m (43.7") | |
| wheelbase: 2.180 m (85.5") | front track: 1.430 m (56.3") | rear track: 1.460 m (57.5") | |
| Rims - tires | 7.5J x 14", tarmac: front 8Jx15", rear 10Jx15" | tarmac: Pirelli P7, front 225/50x 15", rear 345/35x15" | |
| Weight | 880 kg | ||
| Fuel tank | 80 lt | ||
Results in WSCC
Season
Group 5
Group 5
| Car entry, chassis number | Car number/ result | ||||||||||
| Dayt | Vallel | Dijon | Monza | Spa | Targa Florio | Nurb | Le Man | Zeltweg | Watkins Glen | ||
| Team | 24h | 6h | 1000km | 1000km | 1000km | 1000km | 24h | 1000km | 6h | ||
| Lancia Corse, 0002 | #4, 2nd | ||||||||||
| Lancia Corse | #4T, acci dent in practice | ||||||||||
| Total points 9 |
9 | ||||||||||
| Statistics | |||||||||||
| Works Starts/finishes 2/1 | 2/1 | ||||||||||
| Driver | Team entries and car number | ||||||||||
| Lancia Corse | |||||||||||
| Sandro Munari | 4, 4T | ||||||||||
| Jean-Claude Andruet | 4, 4T | ||||||||||
Results in WRC
Races
Works team: Lancia Alitalia
Season
| Entry | Rally event | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Driver Codriver |
Team | POR | KEN | FIN | S.R | R.L | P.R | RAC | TdC | ||||||
| Sandro Munari Mario Mannucci/ Piero Sodano 1524 |
Lancia Marlboro | 1st | 1st | distri butor | engine | ||||||||||
| Sandro Munari Piero Sodano 1512 |
Lancia Marlboro | 3rd | |||||||||||||
| Amilcare Ballestrieri Silvio Maiga/ Mauro Mannini 1513 |
Lancia Marlboro | acci dent | elec trical | ||||||||||||
| Jean-Claude Andruet 'Biche' 1626 |
Lancia Marlboro | 1st | |||||||||||||
| Roberto Cambiaghi Gianpiero Bertocci |
dnf | ||||||||||||||
| Gabriele Sciascia Francesco Bullani |
Jolly Club | dnf | |||||||||||||
| Total points () |
38 | 10 | 10 | 8 | 10 | ||||||||||
| Statistics | |||||||||||||||
| Others starts/finishes | 10/4 | 4/1 | 1/1 | 1/0 | 1/1 | 3/1 | |||||||||
Article from 4T 269, 2/1993
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Article from 4T 91, 4/1978
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Source
SourceBjörn Waldegård-Hans Thorszleius in RAC rally '75
Source
Drawings
Source
page revision: 140, last edited: 06 May 2020 05:08