Engine parts and Ancillaries for your 300Tdi diesel Defender
Although externally very similar to the Discovery/Range Rover version of its predecessor, 208 changes were made. These included modifications to the block, cylinder head, fuel injector system and ancillary systems. The crankshaft, pistons and connecting rods were significantly altered over the 200Tdi. The most obvious external changes were the fitting of a rubber acoustic cover over the engine to reduce noise and the change to a single serpentine belt to drive the ancillaries instead of the multiple V-belts of the older engines. Emissions regulation included the fitting of an exhaust gas recirculation system.
The 300Tdi was noticeably smoother and quieter than the 200Tdi, but was generally found to not be quite as economical in real-world use. When fitted to vehicles with an automatic transmission, power was increased to 122 horsepower to make up for the power losses in the transmission. These engines (designated 23L) had Bosch Electronic Diesel Control systems, where the mechanical injector system was controlled by a drive-by-wire electronic throttle to reduce emissions. The 300Tdi was replaced in 1998 by the 5-cylinder Td5, bringing to an end the line of Land Rover 4-cylinder engines that can be traced back to 1957.