Land Rover Defender

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Land Rover Defenders at Dunsford Land Rovers

The Land Rover Defender (initially called the Land Rover Ninety and Land Rover One Ten) is a British four wheel drive off-road utility vehicle.


The product of continued development of the original Land Rover Series I launched in 1948, it uses the basic yet robust underpinnings of a ladder frame chassis and aluminium body and is available in a huge variety of body types from the manufacturer, plus many more specialist versions such as fire engines.

While perhaps best associated with expeditions, Defenders are also used variously in agriculture, industry and the military. However, in recent years the model has been increasingly utilised as a private car.

The model was introduced in 1983 as the Land Rover Ninety and the Land Rover One Ten, the numbers representing the wheelbase in inches. The number was spelt out in full in advertising and in handbooks and manuals, and the vehicles also carried badges above the radiator grille which read "Land Rover 90" or "Land Rover 110", with the number rendered numerically. The Ninety and One Ten replaced the earlier Land Rover Series, and at the time of launch, the only other Land Rover model in production was the Range Rover.


In 1989, a third model was brought out by Land Rover to be produced in parallel with the other two: the Land Rover Discovery. To avoid possible confusion, from 1991 the Ninety and the One Ten were renamed the Defender 90 and Defender 110. These carried front badges that say "Defender", with a badge on the rear of the vehicle saying "Defender 90" or "Defender 110". The current model, from 2007, still has the space above the radiator for the badge, but this is simply blank, and they have "Land Rover" spelt out across the leading edge of the bonnet in raised individual letters. At the rear is a new '"Defender" badge with an underlining "swoosh". On these current models there are no badges defining the wheelbase model of the vehicle.

The 127-inch (3,226 mm) wheelbase Land Rover 127 available from 1985 was always marketed with the name rendered numerically. Following the adoption of the Defender name, it became the Defender 130, although the wheelbase remained unchanged.

In the United States and Canada, North American Specification (NAS) Defenders sold between 1989 and 1997 said only "Land Rover" with no "90" or "110" numeric designation.

Something of an anachronism in the 2000s, the Defender has no unibody structure and is still largely hand assembled. All its major body panels and sub-assemblies simply bolt together. Thus not only can a Defender be literally broken down to its chassis with simple hand tools, there are no irreplaceable stress points. While appreciated in the field and by enthusiasts, this method of manufacture has become increasingly expensive relative to unibody and modular construction.

Production of the model now known as the Defender began in 1983 as the Land Rover One Ten, a simple name which reflected the 110 inch (2.794 m) length of the wheelbase. The Land Rover Ninety, with 93 inch (2.362 m) wheelbase, and Land Rover 127, with 127 inch (3.226 m) wheelbase, soon followed.[3]


Outwardly, there is little to distinguish the post-1983 vehicles from the Series III Land Rover. A full-length bonnet, revised grille, plus the fitting of wheel arch extensions to cover wider-track axles are the most noticeable changes. While the engine and other body panels carried over from the Series III, mechanically the Ninety and One Ten showed significant modernisation, including:

Coil springs, offering a more comfortable ride and improved axle articulation
A permanent four-wheel drive system borrowed from the Range Rover, featuring a two-speed transfer gearbox with a lockable centre differential

A modernised interior

A taller one-piece windscreen

In addition, a new series of progressively more powerful and more modern engines were designed for future use.

The One Ten was launched in 1983, and the Ninety followed in 1984. From 1984, wind-up windows were fitted (Series models and very early One Tens had sliding panels), and a 2.5 litre, 68 hp (51 kW) diesel engine was introduced. This was based on the earlier 2.3 litre engine, but had a more modern fuel-injection system as well as increased capacity. A low compression version of the 3.5 litre V8 Range Rover engine was available in conjunction with a 5 speed transmission which transformed performance.[4]

This period saw Land Rover market the utility Land Rover as a private recreational vehicle. Whilst the basic pick-up, Station Wagon and van versions were still working vehicles, the County Station Wagons were sold as multi-purpose family vehicles, featuring improved interior trim and more comfortable seats. This change was reflected in Land Rover starting what had long been common practice in the car industry - detail changes and improvements to the County model from year to year in order to attract new buyers and to encourage existing owners to trade in for a new vehicle. These changes included different exterior styling graphics and colour options, and a steady trickle of new "lifestyle" accessories that would have been unthinkable on a Land Rover a few years ago, such as radio/cassette players, styled wheel options, headlamp wash/wipe systems and new accessories such as surfboard carriers and bike racks. The switch from leaf spring to coil spring suspension was crucial to the new models' success. It offered improved off-road ability and load capacity for traditional commercial users, whilst the improved handling and ride comfort now made the Land Rover attractive to the general public.

From 1983 Land Rover introduced a third wheelbase to its utility line-up, a 127-inch (3,226 mm) twin-axle vehicle designed to accommodate larger, heavier loads than the One Ten. Naturally called the Land Rover 127, it was designed specifically with use by utility and electrical companies in mind, as well as military usage.[3] In its standard form it is a five-door six-seater consisting of the front half of a One Ten Station Wagon, and the rear of a One Ten High-Capacity Pick Up (HCPU). The logic was that this allowed a workcrew and their equipment to be carried in one vehicle at the same time. The 127 could carry up to 1.4 tons payload, compared to the 1.03 tons payload of the One Ten and the 0.6 tons of the Ninety.


127s were built on a special production line, and all started life as One Ten Station Wagon chassis (the model was initially marketed as the One Ten Crew Cab, before the more logical 127 name was adopted). These were then cut in two and the 17 inches (432 mm) of extra chassis length welded on before the two original halves were reunited. 127s did not receive their own dedicated badging like the other two models, instead they used the same metal grille badges as used on the Series III 109 V8 models, that simply said Land-Rover.

Although the standard body-style was popular, the 127 was a popular basis for conversion to specialist uses, such as mobile workshops, ambulances, fire engines or even flatbed transports. In South Africa, the Land Rover assembly plant there offered a 127 Station Wagon with seating for 15. Land Rover also offered the 127 as a bare chassis, with just front bodywork and bulkhead, for easy conversion.

Initially held back by the low power of the Land Rover engines (other than the thirsty V8 petrol engine), the 127 benefited from the improvements to the line-up, and by 1990 was only available with the two highest power engines, the 134 hp (100 kW) 3.5 litre V8 petrol, and the 85 hp (63 kW) 2.5 litre Diesel Turbo.

The original One Ten of 1983 was available with the same engine line-up as the Series III vehicles it replaced, namely 2.25 litre petrol and diesel engines, and a 3.5 litre V8 petrol unit (although a small number of 3.2 litre V8 were produced). The intention had always been to provide more powerful engines as soon as the new vehicles had found their feet and the Series III had ceased production. Indeed, in 1981 the 2.25 litre engines had been upgraded from 3- to 5-crankshaft bearings in preparation for the planned increases in capacity and power.


The 2.5 litre version of the diesel engine, producing 68 hp (51 kW), was introduced in both the One Ten and the newly-arrived Ninety. This was a long-stroke version of the venerable 2.25 litre unit (the new version displaced 2495 cc), fitted with updated fuel injection equipment and a revised cylinder head for quieter, smoother and more efficient running. A timing belt also replaced the older engine's chain.

In 1985 the petrol units were upgraded. An enlarged 4-cylinder engine was introduced. This 83 hp (62 kW) engine shared the same block and cooling system (as well as other ancillary components) as the diesel unit. Unlike the diesel engine, this new 2.5 litre petrol engine retained the chain-driven camshaft of its 2.25 litre predecessor. At the same time, the 114 hp (85 kW) V8 was also made available in the Ninety- the first time a production short-wheelbase Land Rover had been given V8 power. The V8 on both models was now mated to an all-new 5-speed manual gearbox.

Diesel Turbo engine1986 saw an important development. For many years Land Rovers had been criticised for their low-powered engines, which, despite the recent improvements, still lagged a long way behind much of the competition. Designed to be simple and durable, the engine had worked for decades, but the venerable engines began to feel old-fashioned and underpowered in an era of high horsepower motors. Drivers were less inclined to use the gearbox to compensate for the older motor's relative lack of power. The "Diesel Turbo" engine was introduced to make up for this long-standing shortfall. The engine was essentially a lightly-turbocharged version of the existing 2.5 litre diesel, with several changes to suit the higher power output, including a re-designed crankshaft, teflon-coated pistons and nimonic steel exhaust valves to cope with the higher internal temperatures.[3] Similarly, an 8-blade cooling fan was fitted, together with an oil cooler. The 2.5 diesel, 2.5 petrol and Diesel Turbo engines all shared the same block castings and other components such as valvegear and cooling system parts, allowing them to be built on the same production line. The Diesel Turbo produced 85 hp (63 kW), a 13% increase over the naturally-aspirated unit, and a 31.5% increase in torque to 150 lb·ft (203 N·m) at 1800 rpm. This finally provided a powerful yet economical powerplant for the vehicle. Externally, turbodiesel vehicles differed from other models only by having an air intake grille in the left-hand wing to supply cool air to the turbo. The engine was only intended to be a short term solution to compete with more advanced Japanese competitors, but was quickly adopted as the standard engine for UK and European markets.

Early turbodiesel engines gained a reputation for poor reliability, with major failures to the bottom-end and cracked pistons. A revised block and improved big end bearings were introduced in 1988, and a re-designed breather system in 1989. These largely solved the engine's problems, but it remains (like many early turbodiesels) prone to failure if maintenance is neglected. Well-maintained engines are capable of long service lives in excess of 150,000 miles (240,000 km). Despite its early problems, the Diesel Turbo was a popular engine choice in its time, especially since it offered improved power, torque and economy over the 2.5 litre petrol engine. Contemporary road-testers compared the engine favourably to its Japanese competitors, despite the age of the basic design. Whilst not being able to match the performance of a V8-engined Land Rover, the Diesel Turbo provided adequate performance for most commercial and private buyers and was a key aspect in Land Rover's sales revival (see below).

At the same time that the Diesel Turbo was introduced, the V8 engine was upgraded. Power was increased to 134 hp (100 kW), and SU carburettors replaced the Zenith models used on earlier V8s.

This was a period of change and success for the company. The new vehicles, with their more modern engines, transmissions and interiors reversed the huge decline in sales that took place in the 1980s (a 21% fall in a single year, 1980–1981). This growth was mainly in the domestic UK market and Europe; African, Australian and Middle-Eastern sales failed to recover significantly. The company itself adopted more modern practices, such as using marketing campaigns to attract new buyers who would not previously have been expected to buy a Land Rover. The operation was streamlined, with most of the satellite factories in the West Midlands that built parts for the Land Rover being closed and production brought into the Solihull factory, which was expanded.


To maximise sales in Europe, Land Rover set up the Special Vehicles division, which handled special low-number conversions and adaptations to the vehicles. The bulk of the division's work was the construction of stretched-wheelbase mobile workshops and crew carriers for British and European utility companies, often including 6-wheel-drive conversions, but more unusual projects were undertaken, such as the construction of an amphibious Land Rover Ninety used by the company as part of its sponsorship of Cowes Week from 1987-90. The Special Projects division also handled specialised military contracts, such as the building of a fleet of 127-inch (3,226 mm) V8-powered Rapier missile launchers for the British Army. The Rapier system actually consisted of three Land Rovers: a 127 which carried the launching and aiming equipment, and two 110s which carried the crew and additional equipment.

The biggest change to the Land Rover came in late 1990, when it became the Land Rover Defender, instead of the Land Rover Ninety or One Ten. This was because in 1989 the company had introduced the Discovery model, requiring the original Land Rover to acquire a name.[3] The Discovery also had a new turbodiesel engine. This was also loosely based on the existing 2.5 litre turbo unit, and was built on the same production line, but had a modern alloy cylinder head, improved turbocharging, intercooling and direct injection. It retained the block, crankshaft, main bearings, cambelt system and other ancillaries as the Diesel Turbo. The breather system included an oil separator filter to remove oil from the air in the system, thus finally solving the Diesel Turbo's main weakness of re-breathing its own sump oil. The 200Tdi as the new engine was called produced 111 hp (83 kW) and 195 lb·ft (264 N·m) of torque, which was nearly a 25% improvement on the engine it replaced (although as installed in the Defender the engine was de-tuned slightly from its original Discovery specification (111 horsepower) due to changes associated with the exhaust).[3]


This engine finally allowed the Defender to cruise comfortably at high speeds, as well as tow heavy loads speedily on hills while still being economical. In theory it only replaced the older Diesel Turbo engine in the range, with the other 4-cylinder engines (and the V8 petrol engine) still being available. However, the Tdi's combination of performance and economy meant that it took the vast majority of sales. Exceptions were the British Army and some commercial operators, who continued to buy vehicles with the 2.5 litre naturally-aspirated diesel engine (in the Army's case, this was because the Tdi was unable to be fitted with a 24 volt generator). Small numbers of V8-engined Defenders were sold to users in countries with low fuel costs or who required as much power as possible (such as in Defenders used as fire engines or ambulances).

Along with the 200Tdi engine, the 127's name was changed to the Land Rover Defender 130. The wheelbase remained the same; the new figure was simply a tidying up exercise. More importantly, 130s were no longer built from "cut-and-shut" 110s, but had dedicated chassis built from scratch.

1994 saw another development of the Tdi engine, the 300Tdi. Although the 200Tdi had been a big step forward, it had been essentially a reworking of the old turbocharged diesel to accept a direct injection system. In contrast the 300Tdi was virtually new, despite the same capacity, and both the Defender and the Discovery had engines in the same state of tune, 111 bhp (83 kW), 195 ft·lbf (264 N·m).[3]

Throughout the 1990s the vehicle attempted to climb more and more upmarket, while remaining true to its working roots. If ordered without any optional extras, the Defender was a basic working tool. If the owner so wished, any number of options and accessories could transform it into a vehicle that was perfectly acceptable as an everyday method of transport, while still retaining excellent off-road abilities. This was epitomised by limited edition vehicles, such as the SV90 in 1992 with roll-over protection cage, alloy wheels and metallic paint and the 50th Anniversary 90 in 1998 equipped with automatic transmission, air conditioning and Range Rover 4.0 litre V8 engine.
A new variant was the Defender 110 Double Cab, featuring a Station Wagon style seating area, with an open pick up back. Although prototypes had been built in the Series days, it was not until the late 1990s that this popular and adaptable vehicle finally reached production.

In 1998 the Defender was fitted with an all-new 2.5 litre, five-cylinder in-line turbodiesel engine, badged the Td5. The Tdi could not meet upcoming Euro III emissions regulations so the Td5 replaced the Tdi as the only available power unit. The engine used electronic control systems and produced 11 hp (8 kW) more than the Tdi, with improved refinement. Traditionalists were critical of the electronic systems deployed throughout the vehicle, but concerns that these would fail when used in extreme conditions proved unfounded.[3]
From Spring 2007 a series of long-anticipated changes were made to the Defender, most of which were implemented to meet emissions and safety legislation. The biggest change was to the drivetrain. The Td5 engine was replaced by an engine from Ford's DuraTorq line, built in their factory in Dagenham, making the Td5 the last Land Rover engine to be built in-house at Solihull. The engine chosen was from the ZSD family, being a version of the 2.4 litre four-cylinder unit also used in the highly successful Ford Transit. The engine's lubrication and sealing system has been adapted for use in wet, dusty conditions and to maintain lubrication at extreme angles in off-road use. Re-tuning the engine means that the power level remains the same at 122 hp (91 kW), but with a lower power peak speed to provide better performance when towing and better acceleration. Torque output rose from 221 lb·ft (300 N·m) to 265 lb·ft (359 N·m) due to the fitting of a variable-geometry turbocharger. This also helps produce a much wider spread of torque than the Td5, from 1500 rpm to 2000 rpm. The engine is mated to a new 6-speed gearbox. 1st gear is lower than the previous gearbox for better low-speed control, whilst the higher 6th gear is intended to reduce noise and fuel consumption at high speeds.

2007 DefenderThe other major changes were to the interior. The dashboard layout of the original One Ten from 1983 (which was in turn very similar to that used on the Series III from 1971) was replaced with a full-width fascia and different instrumentation. Instruments came from the Discovery 3, and some of the centre panels come from the Ford Transit. Some switchgear was carried over from the previous interior. A new heater/ventilation system vastly improved de-misting and heater performance.

Other interior changes were to the seating layout. Legislation from the European Union outlaws the inward-facing seats used in the rear of previous Land Rover Station Wagons. The 2007 Defender replaced the 4 inward-facing seats with two forward-facing seats. This makes the Defender 90 Station Wagon a four seater vehicle (reduced from six or seven), and the Defender 110 Station Wagon a seven seater (reduced from nine). Whilst this is a big reduction in capacity, it brings the Defender in line with its competitors which have generally used this layout for many years. A new bodystyle was introduced on the 110 Station Wagon chassis- the 'Utility'. This was a 5-door Station Wagon body but with the rearmost seats removed and the rear side panels left without windows, producing a 5-seater vehicle with a secure, weatherproof load space.

The only external changes were detail changes. The bonnet was reshaped with a bulge to allow the new engine to fit in the engine bay whilst meeting pedestrian safety rules. The new dashboard and ventilation system necessitated the removal of the distinctive air vent flaps underneath the windscreen which had been a feature of all previous Land Rover utility models. Whilst the flaps have been deleted, the bulkhead pressing remains the same, so the outlines of where the flaps would be are still present.

Now, more than ever, there is a strong division in sales pitch between the Station Wagon versions and the commercially-intended Pick-Ups and Van-bodied versions. The "XS" Station Wagon was introduced in 2002 as a top-specification level and the "County" package could be applied to every model in the line-up. XS models come with many "luxury" features, such as heated windscreen, heated seats, air conditioning, ABS and leather seats. Popular with buyers in the UK and other developed countries, who either used the vehicle for on-road duties such as towing or people-moving, or simply as an interesting and fashionable alternative to an estate car.

At the other extreme, basic models were still popular with farmers, industrial and commercial users, as well as the emergency services. It finds willing buyers in over 140 countries. Land Rover still provides a staggering range of special conversions such as hydraulic platforms, fire engines, mobile workshops, ambulances and breakdown recovery trucks. The 130 remains available with the 6-seater HCPU bodystyle as standard.

Peter S. Waters