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BMW M-106 Engine Information

Updated March 23, 2017

The BMW M106 engine was employed in the turbocharged BMW 745i Turbo beginning in 1983. The M106 replaced the M102 engine in the 7-series and was the highest performing BMW engine at the time.

M106 Engine Specs

The M106 was a six cylinder engine displacing 3.5 litres and was turbocharged to approximately 10 PSI. Compression ratio was 8.0:1, good for power ratings of 252hp at 5,200rpm and 127kg-ft. of torque at a low 2,200rpm. Bore and stroke were 92mm and 86mm, respectively.

About the 745i Turbo

The 745i Turbo was the only car that employed the M106 engine. Chassis code conforming to BMW nomenclature was E23. The Turbo was a European-only model and was very rare at its time. Around 1,000 745i cars with M106 engines were imported to the United States through grey-market channels with questionable legality, making the car one of the hardest BMW cars to obtain to this day.

M106 Engine Successors

After 1985 the 745i Turbo went away from the European market. The engine which succeeded it was the naturally aspirated M30B5 engine, which produced similar power but was not available with a turbocharger. BMW did not produce another turbocharged engine until 2007 with the introduction of the twin-turbo 3.5 litre used in the 135i, 335i and 535i

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About the Author

Jesse Sears is a Los Angeles-based journalist and photographer. He has worked as a professional freelance writer since 2008. Sears has been published in numerous traditional and online media ventures including "The Daily Sundial," "The Pasadena Courier," RSportsCars.com and others. He holds a Bachelor of Arts degree in journalism from California State University, Northridge.