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Monday, December 29, 2008

The BMW Z4 engine finally comes to retirement

Posted by Qcist at 4:08 PM

BMW's S54B32 engine, the straight-six 3.2L cast-iron motivator that powered such greats as the E46 M3, the Z3, Z3 M, Z4 M, and even the Wiesmann MF3, and now BMW plans to retire this engine.

The final Z4s, built at the tail end of 2008, housed the last of the S54 straight-sixes, reports CAR. Instead, the replacement cars will feature only a 3.0L twin-turbo rated at 300hp (223kW) as the top-of-the-range model. They're sure to be fun and are most likely somewhat underrated in terms of outright horsepower, but they are unlikely to have the same character of the outgoing mill.

Singing along at its 7,900rpm power peak - just 100rpm shy of redline - the S54 was one of the most sonorous of BMW's sixes, and a worthy successor to the S50B32 of the E36 M3, itself a sonic powerhouse. At 3.2L, the engine was a middleweight doing the fighting of a heavyweight. Rated at 343hp (252kW) in Euro-spec trim, the addition of U.S. emissions equipment bridled the engine back down to 333hp (248kW) in America.

The S54 engine had won some awards through out the 7 years tenure. This all include the International Engine of the Year Overall and Best New Engine awards in 2001, the winner of the 3-4L category from 2001-2006 and a spot on Ward's 10 Best Engines for four years running from 2002 to 2004.

Though troubled early on by some mechanical problems, most relating to the car's stratospheric redline and some sub-par contracted engine parts, the S54's cast-iron block and otherwise bulletproof construction have earned it a spot among the most praise-worthy engines of recent times.

 

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