About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 39. Chapters: BMW M20, BMW M62, List of BMW engines, BMW N54, BMW M30, BMW M10, BMW N52, BMW M52, BMW M50, BMW OHV V8 engine, BMW N47, BMW S85, BMW M57, BMW M60, Prince engine, BMW N63, BMW M47, BMW N62, BMW S65, BMW M88, BMW S54B32, Tritec engine, BMW N53, BMW M42, BMW M54, BMW M56, BMW M43, BMW M12, BMW M70, BMW N55, BMW N57, BMW N46, BMW N73, BMW N74, BMW M40, BMW M51, BMW Goldfish V16, BMW N42, BMW 247 engine, BMW M67, BMW M73, P60B40, BMW M44, BMW M21, BMW N43, BMW N45, BMW M41, BMW S14, BMW M06, BMW M78, BMW M102, BMW M106. Excerpt: The M20 is an inline-6 piston engine by BMW. Initially designated M20, the 12-valve, belt driven SOHC design was introduced in the 1977 BMW 520/6 and 320/6 as an entirely new design. With displacements ranging from 2.0 to 2.7 liters, it was the "little brother" to the larger BMW M30 engine. It had 91 mm (3.6 in) bore-spacing instead of 100 mm (3.9 in) of the M30. It was intended to replace the larger displacement 4-cylinder motors and was born out of BMW's conviction that a small six had more development potential than a large four (i.e. 2 liters+) Powering the E21 and E30 3-Series, as well as E12, E28 and E34 5 Series cars, it was produced for nearly two decades, with the last examples powering the E30 325i touring built until April 1993. By that time, the newer twin-cam M50 engines with 4 valves per cylinder had already been used in the E36 and E34 for a couple of years. Three different head castings were used over the engine's production run. The earliest was #1264200 aka the "200." These were used in all e21 320/6 and 323i and e12 520/6 engines and later in the e28 and e30 eta engines (eta denoting the 'efficiency' version of the engine, with a lower engine redline amongst other focused differences aimed at increasing fuel economy). The next version was #1277731 aka the "731." This head...
