Land Rover1971–1983Technical specifications

Series III 2.6: Technical specifications

Workshop data for the 2.6-litre petrol. Covers engine, fluids, service and torques: the figures to check before a job or a parts order.

Summary

Match these figures to the vehicle’s VIN plate and service book before ordering parts.

Vehicle specifications

Overview

Make: Land Rover
Model: Series III
Years: 1971–1983
Fuel: Petrol

Performance & efficiency

Power: 71 kW (97 hp)
Engine size: 2,625 cc
Cylinders: 6 · OHV
Fuel system: Stromberg

Fluids & capacities

Engine oil (with the filter): 7.4 litres

All 84 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	6/OHV
Capacity (Fiscal) cc	2625 (2608)
Output - alternative kW (DIN hp) rpm	LC=67 (90)
Compression ratio :1	7,8 LC=7,0
Suitable for unleaded petrol	No
Minimum octane rating RON	98
Ignition system Type	SZ
Ignition system Description	CB
Fuel system Make	Stromberg
Fuel system Type	175 CD
Fuel system Description	Carb-VV

Ignition system

Ignition coil Make	Lucas
Ignition coil Type	HA 12
Primary resistance Ohm	3,0-3,5
Distributor (ECM) Make	Lucas
Distributor (ECM) No.	25D6
Contact breaker gap/trigger air gap mm	0,4
Dwell angle °(%)	32-38 (53-63)

Firing order

The firing order for the Land Rover Series III 2.6 (1971–1983) is 1-5-3-6-2-4.

Firing order	1-5-3-6-2-4

Valve clearances

Valve clearances for the Land Rover Series III 2.6 (1971–1983) are 0,15 mm inlet and 0,25 mm exhaust, measured hot.

Valve clearance - INLET mm	0,15 hot
Valve clearance - EXHAUST mm	0,25 hot

Engine oil & fluids

Engine oil

The Land Rover Series III 2.6 (1971–1983) takes 7.4 litres of engine oil with the filter. The specified engine oil grade is SAE 10W-40 for moderate climates, with API/ACEA classification SF.

Manual gearbox

The manual gearbox has a listed capacity of 1.5 litres. The specified oil is SAE 90W, with classification GL-4.

Transfer box

The transfer box has a listed capacity of 2.50 litres. The specified oil is SAE 90W, with classification GL-4.

Coolant

The listed total cooling-system capacity is 11.2 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	Moderate climate
Engine oil grade SAE	10W-40
Engine oil classification API/ACEA	SF
Engine with filter(s) litres	7.4
Other lubricants and capacities
Manual transmission oil grade SAE	90W
Manual transmission oil classification	GL-4
Manual transmission litres	1.5
Differential oil grade - front SAE	75W-90
Differential front/AT litres	1.75
Differential oil grade - rear SAE	75W-90
Differential rear litres	1.75
Transfer box oil grade SAE	90W
Transfer box oil classification	GL-4
Transfer box litres	2.50
Cooling system - total capacity litres	11.2

Service & electrical

Battery

The Land Rover Series III 2.6 (1971–1983) uses a 12 V, 58 Ah battery (reserve capacity 85 minutes).

Battery V/RC(Ah)	12/85 (58)

Spark plugs

The Land Rover Series III 2.6 (1971–1983) uses Champion RN5C spark plugs with a 0,8 mm electrode gap.

Spark plugs Original equipment	Champion
Spark plug Type	RN5C
Electrode gap mm	0,8
Spark plugs Make	Bosch
Spark plug Type	W8CC
Electrode gap mm	0,8
Spark plugs Make	Champion
Spark plug Type	RN5C
Electrode gap mm	0,8
Spark plugs Make	NGK
Spark plug Type	B5ES
Electrode gap mm	0,8

Tuning and emissions

Ignition advance	Without vacuum and basic timing
Ignition advance checks °Engine/rpm	18-24/1800
Ignition advance checks °Engine/rpm	26-28/3000
Ignition advance checks °Engine/rpm	30-34/4000
Vacuum check	Ignition timing advances
Vacuum starts mbar	220
Vacuum ends mbar	845
Idle speed rpm	500
Fast idle speed - MT/AT rpm	1000-1200
Oil temperature °C	60
CO level at idle speed - tailpipe Vol. % CO	4,5 Max
HC level at idle speed ppm	300
HC level at idle - alternative ppm	-1982=400
CO2 level at idle speed Vol. % CO2	13-16
O2 level at idle speed Vol. % O2	0,5-2,0

Starting and charging

Starter motor Make	Lucas
Starter motor Type	M418G
Maximum cranking amps A	157-191
Alternator Make	Lucas
Alternator Type	16ACR
Alternator output A/V/rpm	34/14/2500
Regulated voltage V	14,1-14,5

Service checks and adjustments

Compression pressure bar	12-12,3 LC=9,8
Oil pressure bar/rpm	2,8-3,5
Radiator cap bar	0,60
Thermostat opens °C	75-80
Drive belt tension - alternator/PAS/AC mm	8,0-11,0

Fuel system

Fuel pump delivery pressure bar	0,15-0,26

Tightening torques

Other engine tightening torques
Cylinder head instructions	—
Main bearings Stage 1	52 Nm
Main bearings Stage 2	104 Nm
Big end bearings Stage 1	14 Nm
Big end bearings Stage 2	28 Nm
Flywheel/driveplate	85-90 Nm
Spark plugs	14-19 Nm
Chassis tightening torques
Road wheels	108 Nm

Frequently asked questions

What is the firing order of the Land Rover Series III 2.6?

The firing order for the Land Rover Series III 2.6 (1971–1983) is 1-5-3-6-2-4.

What spark plugs does the Land Rover Series III 2.6 use?

The Land Rover Series III 2.6 (1971–1983) uses Champion RN5C spark plugs with a 0,8 mm electrode gap.

How much oil does the Land Rover Series III 2.6 take?

The Land Rover Series III 2.6 (1971–1983) takes 7.4 litres of engine oil with the filter. The specified engine oil grade is SAE 10W-40 for moderate climates, with API/ACEA classification SF.

What are the valve clearances for the Land Rover Series III 2.6?

Valve clearances for the Land Rover Series III 2.6 (1971–1983) are 0,15 mm inlet and 0,25 mm exhaust, measured hot.

What battery does the Land Rover Series III 2.6 use?

The Land Rover Series III 2.6 (1971–1983) uses a 12 V, 58 Ah battery (reserve capacity 85 minutes).