Opel Ascona A SR group 2 (1971)
gr.jpg
gb.jpg
Home » Rally Cars » Opel Ascona A SR
Opel-Ascona-A-Röhrl.jpg Source Development chain
1971: Opel Ascona A SR
1978: Opel Ascona B 2.0

On board: see video

Specifications

Click here

Group/Class 2 Homologation number: 5398
Years active 1971-1976 Homologation start: 1/4/1971
Engine
Type Opel CIH 19S, straight 4cyl, 4 stroke, petrol engine. Click here located front longitudinal
Capacity 1897 cc up to 1960 cc WRC: 1897 cc
Bore x Stroke (mm) 93.0 to 94.5 x 69.8
Compression ratio 9.0:1 to 10.5:1
Output power - torgue 160 - 205 HP / 7000 rpm 20.9 kgm (205 Nm) / 6000 rpm
Main bearings 5 of 62mm diameter connecting rod length between centers 128mm, big end bearing internal diameter 52mm
Materials block: cast iron cylinderhead: cast iron
Cams/valves single overhead camshaft in head (SOHC-CIH), chain driven 2 valves/cyl. - 8 valves total. 40mm inlet valve diameter, 34mm exhaust valve diameter. Operation with rocker arms and cam followers. 25o angle between exhaust/inlet valves and vertical
Aspiration natural, 1 x Solex 32 DIDTA-4 or 1 x Solex 40 CCI carburetor, or 2 x dual Weber 45 DCOE carburetors
Ignition electronic, firing order 1-3-4-2
Cooling system watercooled 6.2 lt
Lubrication system dry sump 5.3 lt
Transmission
Type rear wheel drive 4 speed or ZF S5-18/3 5 speed gearbox
Gearbox ratios constant input: 1.438/1 (23/16)
1st: 3.427/1 (31/13)
2nd: 2.157/1 (24/16)
3rd: 1.366/1 (19/20)
4th: 1.000/1
R: 3.318/1 (18/13 x 30/18)
constant input: 1.167/1 (21/18)
1st: 2.871/1 (32/13)
3rd: 1.750/1 (24/16)
3rd: 1.289/1 (21/19)
4th: 1.000/1
R: 2.692 (18/13 x 30/18)
constant input: 1.259/1 (34/27)
1st: 2.990/1 (38/16)
2nd: 1.758/1 (35/25)
3rd: 1.304/1 (31/30)
4th: 1.000/1
5th: 0.874/1 (27/34)
R: 3.670 (18/11 x 32/18)
Diffrential ratio 3.444/1 (31/9), 4.222/1 (38/9), 3.89/1 (35/9), 3.67/1 (33/9), 4.75/1 (38/8) hypoid spiral bevel gear limited slip rear differential
Clutch dry single disk, 204mm diameter
Chassis-body
Type steel monocoque chassis with roll-cage. 2 door coupe steel bodyshell with steel front and rear bumbers
Front suspension double wishbones with coil springs, telescopic gas shock absorbers and anti roll bar
Rear suspension live rigid axle with trailing radius arms, transverse linkage bar, coil springs and telescopic gas shock absorbers
Steering system rack and pinion
Brakes front disks: solid or ventilated 238/244/268mm diameter with 2 piston calipers. Drum rear brakes with 230mm drum diameter. Solid or ventilated rear disks 238/244/268mm diameter with 2 piston calipers dual circuit with servo and adjustable ration split front to rear
Dimensions
length: 4.124 m (170.1 in) width: 1.626 - 1.730 m (64.0 - 68.1 in) height: 1.385 m (54.5 in)
wheelbase: 2.430 m (95.7 in) front track: 1.331 - 1.349 m (52.4 - 53.1 in) rear track: 1.320 - 1.338 m (52.0 - 52.7 in)
Rims - tires 5J or 5.5J x 13", 7J or 8J x 13" 165-13", 185/70-13", 225/50-13" slick tires for tarmac
Weight 950 kg
Weight/power 5.0 kg/HP
Fuel tank 50 - 70 lt

Results in WRC

Races

Works team: Opel Euro Handler Team

Season
Entry Rally event
Driver
Codriver
Team M.C SVE
Entry list
S.R KEN MAR A GRE RAC
Entry list
Marie-Claude 'Beaumont'
Martine de la Grandrive
won ladies cup
Henri Greder
Peter Jopp
?
Statistics
Others starts/finishes 2/1 2/1

Opel_Ascona_A_Rallye.jpg Source
1971-ascona-a-group-2-012.jpg Source
IMG_0019.jpg Source

Drawings

Engine

Opel_CIH_Engine_3.jpg Source
Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License