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BMW N45

FieldValue
nameBMW N45 engine
production2004-2011
configurationInline-4
headAluminium
blockAluminium
valvetrainDOHC, with VVT
fueltypePetrol
displacement1596 cc
1997 cc
bore84 mm
85 mm
stroke72 mm
88 mm
predecessorBMW N40
successorBMW N43

1997 cc 85 mm 88 mm The BMW N45 is a naturally aspirated four-cylinder petrol engine which replaced the BMW N40 and was produced from 2004-2011. It was produced alongside the BMW N46 engine and only sold in some countries, where vehicle taxes favoured small-displacement engines.

The N45 is based on the N46, however it does not have balance shafts or Valvetronic (variable valve lift). As per the N42 and N46, the N45 has double-VANOS (variable valve timing). In 2007, the N45 was updated, which was called the N45N.

In 2007, the N45's successor - the BMW N43 - was introduced. However, the direct-injected N43 was not sold in countries with high-sulfur fuel, so the N45 continued to be produced alongside the N43. The N45 was phased out as new generation vehicles were released with the turbocharged BMW N13 four-cylinder engine.

Models

EngineDisplacementPowerTorqueYears
N45B161596 cc85 kW
at 6,000 rpm150 Nm
at 4,300 rpm2004-2011
N45B20S1997 cc127 kW
at 7,000 rpm200 Nm
at 4,250 rpm2006

N45B16

Applications:

  • 2004–2011 E81/E87 116i
  • 2006–2009 E90/E91 316i

N45B20S

The N45 was enlarged to 1997 cc, to homologate the E90 320si for the World Touring Car Championship. The N45 was chosen over the N46, because its lack of variable valve lift allows higher engine speeds. Instead, the engine used dual overhead camshafts and 16 valves. The main visual difference is the carbon fiber valve cover.

Applications:

  • 2006 E90 320si (Limited production model)

References

References

  1. "Engine specifications for N45 engines".
  2. "BMW 116i now powered by 2.0L N46 Valvetronic".
  3. (28 October 2009). "BMW 320si – A real driver's car".
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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