BMW M40

Source: Wikipedia, the free encyclopedia.
BMW M40 engine
Cooling system
Water cooled
Chronology
PredecessorBMW M10
SuccessorBMW M43

The BMW M40 is an

straight-four petrol engine which was produced from 1987–1994.[1][2] It served as BMW's base model four-cylinder engine and was produced alongside the higher performance BMW M42
DOHC four-cylinder engine from 1989 onwards.

Compared with its M10 predecessor, the M40 uses a belt-driven camshaft,[3] and hydraulic tappets. Like the M10, the M40 uses an iron block and an aluminium head. Fuel injection for the E30 versions is Bosch Motronic 1.3,[4] and the E36 versions use Bosch Motronic 1.7.[5][6]

Following the introduction of the BMW M43 engine in 1991, the M40 began to be phased out.

Versions

Version Displacement Power Torque Year
M40B16-
E30 version
1,596 cc (97.4 cu in) 73 kW (98 hp)
at 5,500 rpm
141 N⋅m (104 lb⋅ft)
at 4,250 rpm
1987
M40B16-
E36 version
75 kW (101 hp)
at 5,500 rpm
143 N⋅m (105 lb⋅ft)
at 4,250 rpm
1991
M40B18-
E30 version
1,796 cc (109.6 cu in) 83 kW (111 hp)
at 5,500 rpm
162 N⋅m (119 lb⋅ft)
at 4,250 rpm
1987
M40B18-
E36 version
85 kW (114 hp)
at 5,500 rpm
165 N⋅m (122 lb⋅ft)
at 4,250 rpm
1991

M40B16

The M40B16 is a 1,596 cc (97.4 cu in) version of the M40, which has a bore of 84 mm (3.3 in) and a stroke of 72 mm (2.8 in).[7] It produces 73 kW (98 hp) and 142 N⋅m (105 lb⋅ft).[8]

Applications:

M40B18

The M40B18 is a 1,796 cc (109.6 cu in) version of the M40, which has a bore of 84 mm (3.3 in) and a stroke of 81 mm (3.2 in).[7] It produces 83 kW (111 hp) and 163 N⋅m (120 lb⋅ft).[6]

Applications:

  • 1987–1994 E30 318i.
  • 1992–1993 E36 318i

See also

References

  1. ^ "BMW M40B18 automotive engine". bmw-grouparchiv.de. Retrieved 15 August 2019.
  2. ^ "BMW M40B16 automotive engine". bmw-grouparchiv.de. Retrieved 15 August 2019.
  3. ^ "M40 - E30 Zone Wiki". www.e30zone.net. Archived from the original on 4 October 2008. Retrieved 27 January 2017.
  4. ^ "3' E30 318i Uncoded DME control unit". www.realoem.com. Retrieved 1 February 2017.
  5. ^ "3' E36 318i Uncoded DME control unit". www.realoem.com. 27 October 1975. Retrieved 1 February 2017.
  6. ^ a b Roy McNeill, Copyright BMW World 1999–2005. "BMW World – 4-Cylinder Engines". Usautoparts.net. Archived from the original on 2014-03-02. Retrieved 2012-05-29.{{cite web}}: CS1 maint: numeric names: authors list (link)
  7. ^ a b "BMW M40 and M43 Four Cylinder Engines". www.unixnerd.demon.co.uk. Archived from the original on 28 September 2015. Retrieved 10 February 2017.
  8. ^ "BMW Heaven Specification Database | Engine specifications for M40 engines". www.bmwheaven.com. Retrieved 2012-05-29.