Engine & identification
Vehicle identification
| No. of cylinders Type | 8/OHV |
|---|---|
| Capacity (Fiscal) cc | 3528 (3470) |
| Compression ratio :1 | 8,13 |
| Suitable for unleaded petrol | Yes |
| Minimum octane rating RON | 91 |
| 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 | AC Delco |
|---|---|
| Primary resistance Ohm | 1,2-1,4 |
| Distributor (ECM) Make | Lucas |
| Distributor (ECM) No. | 35D8 |
| Contact breaker gap/trigger air gap mm | 0,4 |
| Dwell angle °(%) | 26-28 (58-62) |
Firing order
The firing order for the Land Rover 90 3.5 (1983–1985) is 1-8-4-3-6-5-7-2.
| Firing order | 1-8-4-3-6-5-7-2 |
|---|
Valve clearances
Valve clearances on the Land Rover 90 3.5 (1983–1985) are hydraulic — they self-adjust, so no manual clearance figure applies.
| Valve clearance - INLET mm | Hydraulic |
|---|---|
| Valve clearance - EXHAUST mm | Hydraulic |
Engine oil & fluids
Engine oil
The Land Rover 90 3.5 (1983–1985) takes 5.7 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
See the reference table for the complete manual gearbox entries and their conditions.
Coolant
The listed total cooling-system capacity is 12.8 litres.
Grades, filling conditions and capacities
| 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 | 5.7 |
| Other lubricants and capacities | |
| Manual transmission litres | 2,6/2,2 |
| Differential front/AT litres | 1.7 |
| Differential rear litres | 2.3 |
| Cooling system - total capacity litres | 12.8 |
Service & electrical
Battery
The Land Rover 90 3.5 (1983–1985) uses a 12 V, 58 Ah battery (reserve capacity 90 minutes).
| Battery V/RC(Ah) | 12/90 (58) |
|---|
Spark plugs
The Land Rover 90 3.5 (1983–1985) uses Champion RN9YCC spark plugs with a 0,8 mm electrode gap.
| Spark plugs Original equipment | Champion |
|---|---|
| Spark plug Type | RN9YCC |
| Electrode gap mm | 0,8 |
| Spark plugs Make | Bosch |
| Spark plug Type | W7DC |
| Electrode gap mm | 0,8 |
| Spark plugs Make | Champion |
| Spark plug Type | RN9YCC |
| Electrode gap mm | 0,8 |
| Spark plugs Make | NGK |
| Spark plug Type | BP6ES |
| Electrode gap mm | 0,8 |
Tuning and emissions
| Ignition timing | Without vacuum |
|---|---|
| Ignition timing - basic BTDC °Engine/rpm | 5/700 n |
| Ignition advance | Without vacuum and basic timing |
| Ignition advance checks °Engine/rpm | 4-8/1400 |
| Ignition advance checks °Engine/rpm | 24-28/4600 |
| Vacuum check | Ignition timing advances/Ignition timing retards |
| Vacuum range °Engine | 5-7/5-7 |
| Vacuum starts mbar | 305/338 |
| Vacuum ends mbar | 473/676 |
| Idle speed rpm | 600-650 |
| Fast idle speed - MT/AT rpm | 1150-1250 |
| Oil temperature °C | 60 |
| CO level at idle speed - tailpipe Vol. % CO | 1,5-3,0 |
| HC level at idle speed ppm | 300 |
| 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 | 3M100 |
| Maximum cranking amps A | 157-191 |
| Alternator Make | Lucas |
| Alternator Type | A115-45 |
| Alternator output A/V/rpm | 45/14/2500 |
| Regulated voltage V | 13,6-14,4 |
Service checks and adjustments
| Compression pressure bar | 9,5 |
|---|---|
| Oil pressure bar/rpm | 2,1-2,8 |
| Drive belt tension - alternator/PAS/AC mm | 10-15 |
Tightening torques
Cylinder head bolt torque
The cylinder head bolts on the Land Rover 90 3.5 (1983–1985) are tightened in 3 stages: 40-50 Nm, then 60-70 Nm, then a final 88-95 Nm.
| Cylinder head | |
|---|---|
| Tighten | 40-50 Nm |
| Tighten | 60-70 Nm |
| Tighten | 88-95 Nm |
| Cylinder head instructions | — | |
|---|---|---|
| Other engine tightening torques | ||
| Main bearings Stage 1 | — | |
| Main bearings | ||
| Big end bearings Stage 1 | 23-27 Nm | |
| Big end bearings Stage 2 | 47-54 Nm | |
| Flywheel/driveplate | 74-81 Nm | |
| Crankshaft pulley/damper centre bolt | 257-285 Nm | |
| Spark plugs | 16 Nm | |
| Chassis tightening torques | ||
| Road wheels | 108 Nm | |
Bar lengths use a square-root scale so small and large values stay readable.
Frequently asked questions
What is the firing order of the Land Rover 90 3.5?
The firing order for the Land Rover 90 3.5 (1983–1985) is 1-8-4-3-6-5-7-2.
What spark plugs does the Land Rover 90 3.5 use?
The Land Rover 90 3.5 (1983–1985) uses Champion RN9YCC spark plugs with a 0,8 mm electrode gap.
How much oil does the Land Rover 90 3.5 take?
The Land Rover 90 3.5 (1983–1985) takes 5.7 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 90 3.5?
Valve clearances on the Land Rover 90 3.5 (1983–1985) are hydraulic — they self-adjust, so no manual clearance figure applies.
What is the cylinder head torque for the Land Rover 90 3.5?
The cylinder head bolts on the Land Rover 90 3.5 (1983–1985) are tightened in 3 stages: 40-50 Nm, then 60-70 Nm, then a final 88-95 Nm.
What battery does the Land Rover 90 3.5 use?
The Land Rover 90 3.5 (1983–1985) uses a 12 V, 58 Ah battery (reserve capacity 90 minutes).