Land Rover 200 Tdi

Project Gemini - The 200 Tdi

Details: Category: Engines; Last Updated on Tuesday, 01 November 2011 19:57; Written by Site Admin; Hits: 2162

200tdi Defender version

Defender 200 Tdi engine

200 Tdi Discovery

Discovery 200 Tdi engine

In 1989 Land Rover had launched the Discovery, its new family 4x4 that quickly became a European top-seller. One of the key reasons for its success was its ground-breaking new turbodiesel engine. The 200Tdi was one of the first mass produced small-capacity (i.e. not a lorry engine) direct-injection diesels, with the attendant improvements in power and efficiency that system brings. Developed under the codename 'Gemini', the 200Tdi was planned from the start to be used on all Land Rover products. For production reasons, it had to be made using the existing machinery, so it used the same block and crankshaft as the existing 2.5-litre non-turbo diesel engines. It also used many ancillary parts used on the older engines. However, it was a true break with the past. An aluminium alloy cylinder head reduced weight and noise, a new Bosch injection system gave improved running characteristics and better starting performance. An intercooler boosted power and efficiency further. Lessons learnt from the 2.5 Diesel Turbo engine were included, such as the fitment of an inertial separator in the breather system to remove oil before crankcase gases were returned to the air intake. Initially turbocharged and naturally aspirated diesel (NAD) versions and a carburettor-fed petrol version were to be produced. The direct-injection system meant that only machining of the injector sockets was needed to allow the fitment of spark plugs. However, the performance and economy of the turbodiesel version was such that the other planned variants were not produced. The 200Tdi was launched in the Discovery in 1989. It was then fitted to the utility Land Rover 90 and 110 (renamed the Defender) in late 1990. For this application the engine was slightly de-tuned and whilst in the Discovery the 200Tdi used all-new components, packaging restraints in the Defender meant that the 200Tdi in this role shared many exterior parts (such as the timing belt system and case) with the Diesel Turbo. Most obviously the turbocharger was retained in the Diesel Turbo's high mounting position on top of the manifolds in the Defender, rather than being tucked under the manifolds in the original Discovery version. In 1992 the engine was fitted to the Range Rover. Although the older petrol and naturally aspirated diesel units were theoretically still available, the 200Tdi had better performance and economy than any of them, and so dominated the sales figures.

Engine Code: 11L
Layout: 4-cylinder, in-line
Block/Head: Cast iron/aluminium alloy
Valves: OHV, belt-driven camshaft, push-rod operated
Capacity: 2,495 cc (152.2 cu. in)
Bore x stroke: 90.47 mm x 97 mm (3.56 in x 3.81 in)
Compression ratio: 19:1
Fuel injection: Bosch VE rotary pump + Bosch two-stage injectors
Induction: Garrett T25 turbocharger
Power: 111 bhp (83 kW) @ 4,250 rpm (Discovery + Range Rover)
107 bhp (80 kW ) @ 3,900 rpm (Defender)
Torque: 195 lbf·ft (264 N·m) @ 1,800 rpm (Discovery + Range Rover)
188 lbf·ft (255 N·m) @ 1,800 rpm (Defender)
Production: 1989-1994
Used in: Land Rover Defender, Discovery and Range Rover Classic
Mated to: LT-77 gearbox.