Citroen DS21 group 2 (1966)
 Source |
Development chain 1970: Citroen DS21 1973: Citroen DS23 1974: Citroen CX2200 1977: Citroen CX2400 GTi |
Specifications
Click here
Click here for Electronic Fuel Injection version
Click here and here and here for street carburetor version
| Group/Class | 2 | Homologation number: 5030, 5338 and 1583 | |||
| Years active | 1966-1973 | Homologation start: 1/1/1966, 1/4/1970 and 1/1/1970 Homologation end: 1/1/1966, 1/4/1970 and 1/1/1970 |
|||
| Engine | |||||
|---|---|---|---|---|---|
| Type | Citroen DX2 (with carburetor), or DX3 (with injection), straight 4cyl, 4 stroke | located front longitudinal behind front axle | |||
| Capacity | 2175 cc | WRC: 2175 cc | |||
| Bore x Stroke (mm) | 90.0 x 85.5 | ||||
| Compression ratio | 8.75:1, 9.0:1 | ||||
| Output power - torgue | 109 HP @ 5500 rpm 1969: 115 HP @ 5750 rpm 1970 inj: 130 HP @ 5500 rpm 185 HP / 5500 rpm |
18 kgm @ 3500 rpm 1969: 17.4 kgm @ 4000 rpm 1970 inj: 20 kgm @ 4000 rpm 24.7 kgm (242 Nm) / 3600 rpm |
|||
| Main bearings | forged steel crankshaft with 5 main bearings 64 mm diameter, big end bearings journal diameter 53.5mm | steel connecting rod length between centers 160 mm, big end bearing tunnel diameter 57.7mm, aluminium alloy piston with 62.3 mm compression height, 1969: 65 mm (for 9.0:1) compression height | |||
| Materials | block: cast iron | cylinderhead: cross flow aluminium alloy with hemispherical combustion chambers | |||
| Cams/valves | overhead valves with pushrods and rockers (OHV), chain driven side camshaft | 2 valves/cyl. - 8 valves total. 47 mm inlet valve diameter, 1969: 49 mm inlet valve diameter, 39 mm exhaust valve diameter. 2 coil springs per valve | |||
| Aspiration | natural, DX2: x Weber 28/36 DDE carburetor, 1969: 1 x Weber 28/36 DLE or 28/36 DLEA1, or Solex 28/36 SFIF DX3: Bosch D-Jetronic multipoint fuel injection |
||||
| Ignition | electronic, firing order 1-3-4-2 | ||||
| Cooling system | jacketed watercooled with pump, radiator, 306 mm diameter-8 blades fan and thermostat | 10.8 lt, 1970: 13 lt | |||
| Lubrication system | wet sump | 4.5 lt, 1969: 5 lt | |||
| Transmission | |||||
| Type | front wheel drive | Citroen, 4 or 5 speed manual gearbox | |||
| Gearbox ratios | 1st: 3.25/1 (39/12) 2nd: 1.941/1 (33/17) or 2nd: 1.833/1 (33/18) 3rd: 1.273/1 (28/22) or 1.207/1 (35/29) 4th: 0.852/1 (23/27) R: 3.417/1 (41/22x22/12) 1969: R: 3.154/1 (41/22 x 22/13) |
1971: 1st: 3.25/1 (39/12) 2nd: 1.941/1 (33/17) 3rd: 1.321/1 (37/28) 4th: 0.970/1 (32/33) 5th: 0.784/1 (29/37) R: 3.154/1 (41/22x22/13) |
1971: 1st: 3.25/1 (39/12) 2nd: 1.833/1 (33/18) 3rd: 1.206/1 (35/29) 4th: 0.852/1 (23/27) 5th: 0.757/1 (28/37) R: 3.154/1 (41/22x22/13) |
||
| Diffrential ratio | 4.857/1 (34/7), 4.375/1 (35/8) | helical gears limited slip front differential | |||
| Clutch | dry single disc, 225 mm disc diameter | ||||
| Chassis-body | |||||
| Type | steel monocoque mounted on twin longeron main frame MA chassis with roll-cage. 4 door saloon steel bodyshell with steel bumbers | ||||
| Front suspension | upper and lower transverse arms with anti-dive geometry, hydropneumatic spring/damper units, anti-roll bar | ||||
| Rear suspension | trailing arms, hydropneumatic spring/damper units, anti-roll bar | ||||
| Steering system | rack and pinion with hydraulic servo assistance | 3.5 turns lock to lock, 1969: 3.25 turns | |||
| Brakes | front solid disks 300mm diameter with 2 piston calipers and 60 mm piston diameter, rear drums 255 mm diameter and 1 double piston caliper and 18mm piston diameter | dual circuit with servo, adjustable ratio split front to rear | |||
| Dimensions | |||||
| length: 4.838 m (190.5") | width: 1.816 m (71.5") | height: 1.470 m (57.9") | |||
| wheelbase: 3.125 m (123.0") | front track: 5J: 1.500 m (59.1") or 5.5J: 1.516 m (59.7) | rear track: 5J: 1.300 m (51.2") or 5.5J: 1.316 m (51.8) | |||
| Rims - tires | steel rims 5" or 5.5" x 15" | Michelin XAS 180 x 380 or 185-HR15 | |||
| Weight | 1250 kg | front/rear distribution 65%-35% | |||
| Fuel tank | 65 lt | ||||
| Drag coefficient | 0.38 | ||||
Results in WRC
Races
Season
| Entry | Rally event | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Driver Codriver |
Team | M.C | SVE Entry list |
S.R | KEN | A | GRE | RAC Entry list |
|||||||
| Noël Pouderoux R. Vincent |
14th | ||||||||||||||
| Guy Verrier Francis Murac |
18th | ||||||||||||||
| Henri Ido Marang Didier Nithart |
26th | ||||||||||||||
| Jean-Luc Salomon Saintigny |
acci dent | ||||||||||||||
| Jean-Claude Ogier Lucette Pointet-Ogier |
brakes | ||||||||||||||
| Marcus Bryde Aage Braein |
dnf | ||||||||||||||
| Lavalle Praty |
dnf | ||||||||||||||
| Panah-Izadi Genoc |
dnf | ||||||||||||||
| Calcagno GianMarco Cerchio |
dnf | ||||||||||||||
| Viglietta Pellizzeri |
dnf* | ||||||||||||||
| Richard Bochnicek Sepp-Dieter Kernmayer |
11th | ||||||||||||||
| Wolfgang Petzl Werner Schulz |
dnf | dnf | |||||||||||||
| Statistics | |||||||||||||||
| Others starts/finishes | 12/4 | 8/3 | 2/1 | 1/0 | |||||||||||
*Group 1 entries
SourceDS 21 Proto chassis court
Source
Source1966 model
Drawings
Source
Engine
Source
Source
Source
Suspension
Source
SourceCitroen DS19 Hydropneumatic suspension
Source
Source
SourceHydraulic pump for hydropneumatic suspension
page revision: 102, last edited: 26 Dec 2019 15:54