Specifications Reliant 850CC Engines

Industrial units for original equipment applications
Reliant can offer engines, gearboxes, and rear axles at OE prices to customers
satisfying basic requirements for original equipment applications.

848cc petrol engines
All engines are 848cc OHV, 4 cylinder, four stroke, water cooled,
die cast aluminium block with removable cast iron liners.

PERFORMANCE FIGURES (Automotive to DIN 70020)
848HC 9.5:1
Power: ....................... 29.1kw (39.0 BHP) at 5500 rpm
Torque: ....................... 60.0 Nm (44.25 lb/ft) at 3500 rpmMax.
BMEP: ............... 889 kN/sq. m (129 lb/sq. in)

ENGINE SPECIFICATIONGENERAL DATA:
4 cylinder, four stroke, water cooled die cast aluminium cylinder block with removable
cast iron liners.
Die cast aluminium cylinder head with valve seats for lead free applications and cast iron valve guides.
Forged steel counter-balanced crankshaft mounted on 3 lead bronze steel-backed bearings.
Forged steel connecting rods mounted on lead bronze steel-backed bearings.

Bore: .........................................62.50 mm (2.46 in)
Stroke: ........................................69.09 mm (2.72 in)
Firing order: ................................1, 3, 4, 2
Crankcase ventilation: ................Sealed unit - breathing into carburettor
Engine mounting: ........................4 point suspension on rubber mountings (2 on gearbox)

Clutch: ........................................159 mm (6-1/4 in) Dry single plate
Carburettor: .................................SU HS2
Fuel pump: ..................................Mechanical
Air cleaner: ..................................Paper element
Oil filter: .......................................Full flow, replaceable
Water pump: ...............................Centrifugal, belt driven
Fan: .............................................Mechanical, 254 mm (10 in) 3 blade
Electrics: ....................................12V, negative earth
Alternator: ...................................A127/45, 45 amp output
Starter motor: .............................Pre-engaged type
Distributor: ..................................Sliding contact breaker points
Drive: ..........................................Skew gear from camshaft
Ignition advance: ........................Centrifugal and vacuum

OVERALL DIMENSIONS:

Length - fan to flywheel: ...................... 493 mm (19.4 in)
Height: ................................................. 610 mm (24.0 in)
Width: ................................................. 417 mm (16.4 in)
Weight - dry: ........................................ 58 kg (128 Ibs)

GEARBOX AND REAR AXLE
A 4 speed all synchromesh gearbox and spiral bevel gear rear axle,
specifically designed for use with the RELIANT 848cc engine, is also available.

RELIANT gearbox
Transmission:
Four forward speeds and reverse; synchromesh on all forward gears.

Gear ratios: ......................................

1st 3.88:1
2nd 2.05:1
3rd 1.32:1
Top 1.00: 1
Reverse 3.25:1
Weight:............................................. 14.06 kg (31 Ib)

RELIANT rear axle
Description:
Axle case: ....................................... Aluminium
Axle tubes/ends: ............................ Steel
Ratios available: ............................. 3.23:1
Standard overall width: .................. 1366 mm (54 in)
Standard brake drum size: ............. 178 mm (7 in)
Weight: ........................................... 32.7 kg (72 Ib)

 

All engines after number 87143 run on unleaded, before need lead.

(87143 was made in mid 1989).

 

Robin1 made 1973 to 1981

Until 1975 all had 750cc Engine & Zenith Carb

Robin 2 made 1991 to 1999

Late 1975 on all have 850cc Engine & S.U Carb

Robin 3 made 1999 to 2001

Variations:

Reliant Robin Mk 1 (750cc): 1973 - 1975

Reliant Robin Mk 1 (850cc): 1975 - 1981

Reliant Robin Mk 2 (LX,SLX):1989 - 1999

Reliant Robin MK 3: 1999 - 2001

Reliant Robin BN1 / BN2: 2001- 2002

Special Editions:

Reliant Robin Jubilee: 1977

Reliant Robin Diamond: 1985

Reliant Robin 65: 2000 – 2001

typical 850cc engine number e.g. 3d/85/69889
the 85 middle number says it's an 850cc
if the engine number has an "E" after it eg 3l/85/71877 E
then it is the so called economy engine which has a
10.5 to 1 compression against the standard comp of 9.5 to 1 comp.

 

SU type: HS Carburettor.

1 Body
2 Piston lifting spring
3 Spring for pin
4 Sealing washer
5 Plain washer
6 Circlip
7 Suction chamber
8 Suction chamber screw
9 Piston
10 Spring
11 Jet needle with collar
12 Needle spring
13 Needle guide
14 Needle guide - locking screw
15 Piston damper
16 Damper sealing washer
17 Throttle adjusting screw
18 Spring for screw
19 Float-chamber
20 Float chamber gasket
21 Float
22 Float hinge pin
23 Float chamber lid
24 Needle & seat
25 Baffle plate
26 Float chamber lid screw
27 Spring washer
28 Float chamber-securing bolt
29 Spring washer
30 Plain washer
31 Throttle spindle
32 Throttle disc
33 Throttle disc screws
34 Throttle spindle washer
35 Throttle return lever
36 Fast idle screw
37 Spring
38 Throttle spindle lock nut washer
39 Throttle spindle nut
40 Jet assembly
41 Jet assembly sleeve nut
42 Washer
43 Gland
44 Ferrule
45 Jet bearing
46 Skid washer
47 Jet lock nut
48 Spring
49 Jet adjusting nut
50 Pick-up lever assembly
51 Pick-up lever link
52 Lever to jet securing screw
53 Pivot bolt
54 Pivot bolt tube—inner
55 Pivot bolt tube—outer
56 Distance washer
57 Cam lever
58 Washer
59 Cam lever spring
60 Pick-up lever spring
61 Piston guide key
62 Key securing screw
63 Piston lifting pin-alternative
64 Float chamber spacer

DUTCH !!! Below:

Hier volgt een lijst met referentie nummers:

Luchtfilter : 750cc-CA2695(fram) / 850cc-917(Crossland) / 850cc-C1213 (Mann filter)

Temp. voeler : Idro-stop 60.6010

V-snaar : Gates 6208mc / Gemeni B1400

Bougies : NGK-BPR6ES / Bosch WR78X (vierpunts bougie)

Contactpunten : Doduco 622 / Bremi 1576

Verdelerkap : Doduco D4525

Rotor: Doduco D5505 (mini 90)

Oliefilter : Mann-FI-OC4 / Fram-PH2834 / Fram PH 5112

Remvoeringen : Voor Unipart-W221DX - Achter Unipart-U347B

Kleprubbers : Rover AHU1626A

Engine numbers

The first section of an 850 engine number denote year and month.
A=Jan, B=Feb, C=Mar, D=Apr, E=May, F=Jun, G=July etc..
6=1976, 7=1977, 8=1978, 9=1979, 0=1980, 1=1981, 2=1982, 3=1983.
I can just about confirm this!

We know the second section is the engine size i.e. 85 = 850cc.

The first section of an 850 engine number denote year and month.
A=Jan, B=Feb, C=Mar, D=Apr, E=May, F=Jun, G=July etc..
6=1976, 7=1977, 8=1978, 9=1979, 0=1980, 1=1981, 2=1982, 3=1983.
I can just about confirm this!

We know the second section is the engine size i.e. 85 = 850cc.

The third section appears to be a consecutive numbering of engines.

SO....

2D/85/65955 is an 850cc engine made in April'82 3D/85/69696 is an 850cc engine made in April'83

If we subtract the two engine numbers we get 3741 which should be, roughly, the number of Reliant engines produced in that 12 month period.

Source: R3W - Str8lolly