Rover L-Series engine
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The L-Series engine is an automotive diesel engine built by Powertrain Ltd, a sister company of MG Rover.
[edit] History
The L-Series engine commenced production in January 1995 and was the first in-house designed and manufactured direct injection diesel for use in Rover Cars applications and derived from the established Perkins MDi Prima engine used in the Austin Montego. It is extremely versatile and has been fitted in the Land Rover Freelander, Rover 200 Mk3, Rover 400 Mk2, Rover 600, and European versions of the Honda Accord and Honda Civic.
[edit] Technology
The current engine is intercooled and has an electronically controlled injection system that uses Bosch injection equipment. This is the version that is used in the Rover 25, Rover 45, MG ZR, and MG ZS.
The engine is extremely environmentally friendly in terms of its emissions. It is quiet in operation owing to its two stage fuel injection & ECU controlling fuel and timing. The engine currently satisfies ECD IIl derogated Diesel emissions legislation when installed with an appropriate specified oxidation catalyst.
Sensors around the engine consistently give feedback to the ECU regarding injection timing, engine speed, load, fuel and coolant temperature, boost pressure etc to ensure that optimum running conditions are maintained.
The basic engine is a conventional 4 cylinder with 2 valves per cylinder operated by a single overhead camshaft and hydraulic tappets.
The block is made of cast iron with aluminium alloy head and sump. An Allied Signal GT15 turbo charger supplies boosted air. A fully modulated, water cooled exhaust gas recirculation (EGR) system is incorporated into the intake/exhaust system.
All accessories (PAS, aircon, water pump, vacuum pump, alternator) are all driven off a single poly-vee-belt drive with autotensioner. Camshaft and injection pump drive is via multi-toothed belts and manual tensioners.
[edit] Specifications
The L-series engine has been availbable in 3 specifications.
84bhp Turbo/Non-intercooled (ceased production in 2000)
104bhp Turbo/intercooled
111bhp Turbo/intercooled
General
Bore - 84.5m(3.33")
Stroke - 88.9mm(3.5")
Displacment - 1994cc
Firing order - 1-3-4-2
Compression ratio - 19.5:1
Boost pressure - 14psi
Fuel pressure - 20,500psi maxv
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