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3453cc M88/3 engine in M635 CSi
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- Six cylinder DOHC, 30° slant installation
- Bore 93.4 mm, stroke 84 mm
- Bosch ML-Jetronic fuel injection
- 286 bhp at 6500 rpm
- 250 lb.ft. at 4500 rpm

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Note the large wet sump layout; the M1 and the racing models all used dry sump lubrication.
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Graphic illustration of engine perfomance showing the power and torque curves.


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Power, bhp
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Torque, Nm
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It took them years to make that exhaust system work efficiently within a slant installation, beneath the road M635 coupe's bonnet.
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Installed within the coupe, the 3453cc seem to fill every nook and cranny with the promise of power almost unlimited.
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