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The BMW M47 and Rover Group M47R are straight-4 Diesel engines. Variants were manufactured by BMW from 1998 to 2007. Variants were manufactured by BMW from 1998 to 2007. BMW gradually adopted high-pressure common rail fuel injection systems over the lifetime of the M47.
The M41 engine was the first four-cylinder diesel engine from BMW. The engine was derived from the six-cylinder BMW M51 engine and shared 86% of its components. This engine became available in several models of the E36: 4-door sedan; 5-door touring; 3-door compact
BMW is well known for its history of inline-six (straight-six) engines, a layout it continues to use to this day despite most other manufacturers switching to a V6 layout. . The more common inline-four and V8 layouts are also produced by BMW, and at times the company has produced inline-three, V10 and V12 engines, BMW also engineered non-production customised engines especially for motorsports ...
In the 1970s BMW decided to develop an engine, which would both be powerful and have a good fuel economy.This was caused by the oil crisis in 1973.In 1975 a group of BMW engineers started working on the M78/M105 diesel engine project, using the M20 petrol engine as the basis.
However, the engines had a significant shortcoming: they were based on the same block design as the gasoline engines. As such, the head bolts were not strong enough for a diesel engine, and soon gained a reputation for unreliability and poor performance that damaged the North American passenger car diesel market for the next 30 years.
The M51 is a water-cooled and turbocharged inline six-cylinder diesel engine with a Bosch VP37-swirl-chamber-injection. [1] [2] [3] The displacement is 2.5 L; 152.4 cu in (2,497 cc) and the compression ratio is 22.0:1. Some engine variants have an intercooler in addition to the turbocharger, they can be identified by the tds. [2]
The engine is a common rail turbodiesel V8 design, using double overhead camshafts and 32 valves. It is the first luxury car application of a bi-turbo diesel intercooled V8 engine. The 3.9-litre iteration won the "3-4 L" category of the International Engine of the Year award in 1999 and again in 2000. It was replaced by the 6-cylinder M57 engine.
The V8 diesel engine wasn't offered again until 1999 when Mercedes-Benz introduced the 4-litre OM628 V8 diesel engine for its passenger vehicles. Audi followed in 2003 with its 4-litre V8 TDI. Mercedes-Benz ended the production in 2010, leaving Audi to be exclusive manufacturer of V8 diesel engine to this day.