BMW N52

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BMW N52 engine
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N52B30 from an E87 130i M Sport (195 kW/315 Nm)
ManufacturerBMW, Bayerische Motoren Werke AG
Production2004–
PredecessorBMW M54
ClassStraight-6

The BMW N52 is BMW's latest straight-6 engine, which debuted in 2004 on the BMW E63 630Ci. Its crankcase is made entirely of magnesium and aluminum, a first in the world of engine construction. BMW used Alusil aluminum cylinder sleeves, which offer high heat conductivity, and cast them into a lightweight magnesium block [1], creating one of the lightest production engines of its size class in the world at 161 kg (354 lb).

It includes BMW's second generation Valvetronic system and Double-VANOS for fuel-efficiency (12% fuel savings over the previous generation BMW M54 engine - and increases performance. Producing 63 kW (85.5 hp) per liter of displacement, it has the lowest weight per horsepower of any six cylinder engine (1.24 hp per kilogram with the latest version). It is the world’s lightest six-cylinder engine.

It was awarded as one of Ward's 10 Best Engines of the Year in 2006 and 2007. Technologically it is even more advanced than the new N54B30 bi-turbo, which is based on an older M54B30 design and lacks several improvements that BMW has made for this engine.

All BMWs are available with this engine in at least one version.

The N52 is BMW's 12th generation production straight-6 engine.


Models
Engine Displacement Power Torque Redline Year
N52B25 2.5 L (2497 cc/152 in³) 130 kW (174 hp) @ 5800 230 N·m (170 ft·lbf) @ 3500-5000 7000 rpm 2005
160 kW (215 hp) @ 6500 250 N·m (184 ft·lbf) @ 2750-4250 7000 rpm 2005
N52B30 3.0 L (2996 cc/182 in³) 190 kW (255 hp) @ 6600 300 N·m (221 ft·lbf) @ 2500-4000 7000 rpm 2004
195 kW (265 hp) @ 6600 315 N·m (232 ft·lbf) @ 2750-4250 7000 rpm 2005
200 kW (272 hp) @ 6650 315 N·m (232 ft·lbf) @ 2750-4250 7000 rpm 2006

N52B25

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N52B25 from a BMW 325 Coupé

The N52B25 comes in two versions, both displacing 2.5 L (2497 cc/152 in³). The first produces 130 kW (174 hp) at 5800 rpm and 230 N·m (170 ft·lbf) at 3500-5000 rpm while the more powerful version is rated at 160 kW (215 hp) at 6500 rpm and 250 N·m (184 ft·lbf) at 2750-4250 rpm.

Applications:

  • 130 kW (177PS/174 hp) and 230 N·m (170 ft·lbf)
    • E60/E61 523i (Not in the US market) Sedan and Touring
    • E90 323i (Not in the US market) Sedan
  • 160 kW (218PS/215 hp) and 250 N·m (184 ft·lbf)

N52B30

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N52B30 from a BMW Z4 3.0si

The N52B30 comes in three versions, all displacing 3.0 L (2996 cc/182 in³) and produces variable outputs depending on the BMW model that it comes with (with changes to the variable resonance system-omitted, dual plenum runner system-also omitted and variable back pressure muffler-omitted) 190 kW (255 hp) at 6600 and 300 N·m (221 ft·lbf) at 2500-4000 rpm is the first and most produced version, while the second one is more powerful at 195 kW (265 hp) at 6600 and 315 N·m (232 ft·lbf) at 2750-4250 rpm. The third version is just starting to replace the first 190 kW versions on the E90/E60 in Late 2006 and has first been released on the new E92 330i Coupé. It will produce 200 kW (272 hp) at 6650 and 315 N·m (232 ft·lbf) at 2750-4250 rpm.

Applications in the US Market (taken from BMWUSA website 07/10/07):

  • 260 hp (195 kW) @ 6600 rpm and 225 ft·lbf (305 N·m) @ 2750 rpm
  • 255 hp (190 kW) @ 6600 rpm and 220 ft·lbf (300 N·m) @ 2750 rpm
  • 230 hp (172 kW) @ 6500 rpm and 200 ft·lbf (271 N·m) @ 2750 rpm
  • 215 hp (160 kW) @ 6250 rpm and 185 ft·lbf (250 N·m) @ 2750 rpm

Applications in the European Market (taken from BMW website 07/10/07):

  • 200 kW (272 PS,268 hp) @ 6700 rpm and 320 N•m @ 2750 rpm

NB: All X30i models will soon receive this version of the N52B30 engine.

  • 200 kW (272 PS,268 hp) @ 6650 rpm and 315 N•m @ 2750 rpm
  • 195 kW (265 PS,262 hp) @ 6650 rpm and 315 N•m @ 2750 rpm
  • 190 kW (258 PS,255 hp) @ 6600 rpm and 300 N•m @ 2500 rpm
  • 160 kW (218 PS,215 hp) @ 6200 rpm and 270 N•m @ 2500 rpm

See also

References

External links