Land Rover · 1987–1989

Range Rover Classic 3.5: Technical specifications

Technical specifications (1987–1989)

The Land Rover Range Rover Classic (73-95) 3.5 is the 3.5-litre petrol variant, engine code 25D, built from 1987 to 1989. Quick answers and key figures below, then the full workshop tables.

Updated 8 Sep 2026

Engine code25D

Power93 kW (126 hp)@ 4000 rpm

FuelPetrol

Cylinders8

Oil capacity5,7litres · with the filter

Engine & identification

Vehicle identification

No. of cylinders Type	8/OHV
Capacity (Fiscal) cc	3528 (3470)
Compression ratio :1	9,35
Suitable for unleaded petrol	Yes
Minimum octane rating RON	98/95
Ignition system Type	TSZ-i
Ignition system Description	Trans-i
Trigger location	Distributor
Fuel system Make	SU
Fuel system Type	HIF 44
Fuel system Description	Carb-VV
Diagnostic socket	Yes

Ignition system

Ignition coil Make	Lucas
Ignition coil Type	32C5
Ignition coil supply voltage + with ballast V	11,0
Primary resistance Ohm	0,0-9,9
Distributor (ECM) Make	Lucas
Distributor (ECM) No.	42650

Firing order

The firing order for the Land Rover Range Rover Classic 3.5 (1987–1989) 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 Range Rover Classic 3.5 (1987–1989) 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 Range Rover Classic 3.5 (1987–1989) takes 5.7 litres of engine oil with the filter.

A listed engine oil option is SAE 10W-40 for moderate climates, with API/ACEA classification SF.

A listed engine oil option is SAE 20W-50 as an alternative for moderate climates.

Manual gearbox

The manual gearbox has a listed capacity of 2.7 litres. The specified oil is ATF M2C33.

Coolant

The listed total cooling-system capacity is 11.4 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
Ambient temperature range	Moderate climate alternative
Engine oil grade SAE	20W-50
Engine with filter(s) litres	5.7
Other lubricants and capacities
Manual transmission oil grade SAE	ATF M2C33
Manual transmission litres	2.7
Automatic transmission fluid Type	Dexron IID
Automatic transmission (drain & refill) litres	5.0
Differential front/AT litres	1.7
Differential oil grade - rear SAE	90W
Differential rear litres	2.3
Cooling system - total capacity litres	11.4

Service & electrical

Ignition timing

Basic ignition timing for the Land Rover Range Rover Classic 3.5 (1987–1989) is 6°±1° BTDC at 750 rpm.

Ignition timing	Without vacuum
Ignition timing - basic BTDC °Engine/rpm	6±1/750
Ignition timing - alternative °Engine/rpm	95=3±1/750

Battery

The Land Rover Range Rover Classic 3.5 (1987–1989) uses a 12 V, 60 Ah battery (reserve capacity 90 minutes).

Battery V/RC(Ah)	12/90 (60)

Spark plugs

The Land Rover Range Rover Classic 3.5 (1987–1989) uses Champion RN11YCC spark plugs with a 0,8 mm electrode gap.

Spark plugs Original equipment	Champion
Spark plug Type	RN11YCC
Electrode gap mm	0,8
Spark plugs Make	Autolite
Spark plug Type	APP63
Electrode gap mm	0,8
Spark plugs Make	Beru
Spark plug Type	14-7DU
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	RN11YCC
Electrode gap mm	0,8
Spark plugs Make	NGK
Spark plug Type	BPR6E-VG
Electrode gap mm	0,8

Tuning and emissions

Ignition advance	Without vacuum and basic timing
Ignition advance checks °Engine/rpm	5-9/2000
Ignition advance checks °Engine/rpm	13-18/3000
Ignition advance checks °Engine/rpm	11-18/5600
Idle speed rpm	700-800
Fast idle speed - MT/AT rpm	1050-1150
Oil temperature °C	70
CO level at idle speed - tailpipe Vol. % CO	0,5-2,5
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	M78R
Maximum cranking amps A	162-198
Alternator Make	Lucas
Alternator Type	133/65
Alternator output A/V/rpm	65/14/3000
Voltage regulator Type	15TR
Regulated voltage V	13,6-14,4

Service checks and adjustments

Oil pressure bar/rpm	2,1-2,8/2400
Radiator cap bar	1,00
Thermostat opens °C	88
Drive belt size - alternator mm	9,5x1250
Drive belt tension - alternator/PAS/AC mm	11-14

Fuel system

Fuel pump delivery pressure bar	0,28-0,42

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Land Rover Range Rover Classic 3.5 (1987–1989) 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

Other engine tightening torques
Cylinder head instructions	—
Main bearings Stage 1	—
Main bearings
Big end bearings Stage 1	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	14-16 Nm
Chassis tightening torques
Brake caliper/carrier to hub Front	82 Nm
Brake caliper/carrier to hub Rear	82 Nm
Road wheels	—

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 Range Rover Classic 3.5?

The firing order for the Land Rover Range Rover Classic 3.5 (1987–1989) is 1-8-4-3-6-5-7-2.

What spark plugs does the Land Rover Range Rover Classic 3.5 use?

The Land Rover Range Rover Classic 3.5 (1987–1989) uses Champion RN11YCC spark plugs with a 0,8 mm electrode gap.

How much oil does the Land Rover Range Rover Classic 3.5 take?

The Land Rover Range Rover Classic 3.5 (1987–1989) takes 5.7 litres of engine oil with the filter. A listed engine oil option is SAE 10W-40 for moderate climates, with API/ACEA classification SF. A listed engine oil option is SAE 20W-50 as an alternative for moderate climates.

What are the valve clearances for the Land Rover Range Rover Classic 3.5?