for the M50, while also ensuring higher torque values throughout the entire speed range. This, in effect, raises the maximum torque value from 222Nm/168 lb. Less energy is lost during gas exchange, so that power output and torque are higher at all engine speeds.Using four valves per cylinder has various advantages:
The installed angle of the M50 is 30° versus 20° for the M20. And, above all, to combine these objectives with the silky smooth running of an inline six-cylinder engine.Ĭontinuing the tradition of the other BMW multi-valve engines, the new M50 provides a high specific power output - 141 KW/188 HP 5900 rpm, a generous torque curve - 245Nm 4700 rpm (= maximum torque) and low emission and fuel consumption levels.Īdditional advanced design features include: direct solid state ignition with separate coils mounted above spark plugs, a new generation of Digital Motor Electronics - DME 3.1, maintenance-free ribbed belt drive to the auxiliaries, self-adjusting hydraulic valve tappets, vertical oil filter configuration, a plastic intake manifold assembly and asbestos-free gaskets and seals.ĭespite its use of four valves per cylinder and its higher performance, the M50 weighs only slightly more than the M20. The main development objectives were to maximize power output and torque and to maintain high quality standards and long life, with even easier maintenance and servicing. Known internally as the M50 engine, it uses the same technological concept as the four-cylinder, four valve engine (M42) found in the 318i and 318is models. 110490000, October 1990.īMW has developed a new six-cylinder, four valve engine which will be found in the 525i model.
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