BMW M40

From Wikipedia, the free encyclopedia
Jump to: navigation, search
BMW M40
M40B16.JPG
Overview
Manufacturer BMW
Production 1987–1995
Combustion chamber
Configuration SOHC Straight-4
Displacement
  • 1.6 L (1596 cc; 97.4 cu in)
  • 1.8 L (1796 cc; 109.6 cu in)
Chronology
Predecessor BMW M10
Successor BMW M43

The BMW M40 is an inline-four SOHC piston engine which replaced the M10 and was produced from 1987–1995. Displacement ranges from 1.6 L to 1.8 L. It began to be replaced by the M43 SOHC engine in 1991, however from 1989 the M40 was produced alongside the higher performance M42 DOHC four-cylinder engine.

Compared with its M10 predecessor, the M40 uses a belt-driven camshaft,[1] 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,[2] and the E36 versions use Motronic 1.7.[3]

Models[edit]

Engine Displacement Power Torque Redline Year
M40B16
E30 version
1,596 cc (97.4 cu in) 75 kW (101 hp)
@ 5,500 rpm
143 N·m (105 lb·ft)
@ 4,250 rpm
6200 1987
M40B16
E36 version
73 kW (98 hp)
@ 5,500 rpm
141 N·m (104 lb·ft)
@ 4,250 rpm
6200 1991
M40B18
E30 version
1,796 cc (109.6 cu in) 85 kW (114 hp)
@ 5,500 rpm
165 N·m (122 lb·ft)
@ 4,250 rpm
6200 1987
M40B18
E36 version
83 kW (111 hp)
@ 5,500 rpm
162 N·m (119 lb·ft)
@ 4,250 rpm
6200 1991

M40B16[edit]

The M40B16 is a 1.6 L (1,596 cc) version of the M40, which has a bore of 84 mm (3.3 in) and a stroke of 72 mm (2.8 in).[4] It produces 102 hp (76 kW) and 105 lb·ft (142 N·m) of torque.[5] The E30 version uses Bosch Motronic 1.3 fuel injection, while the E36 version uses Motronic 1.7.[6]

Applications:

M40B18[edit]

The M40B18 is a 1.8 L (1,796 cc) version of the M40, which has a bore of 84 mm (3.3 in) and a stroke of 81 mm (3.2 in).[4] It produces 113 hp (84 kW) and 120 lb·ft (160 N·m) of torque.[6] Like the M40B16, the fuel injection system is Bosch Motronic 1.3 for the E30 versions and Motronic 1.7 for the E36.

Applications:

References[edit]

  1. ^ "M40 - E30 Zone Wiki". www.e30zone.net. Retrieved 27 January 2017. 
  2. ^ "3' E30 318i Uncoded DME control unit". www.realoem.com. Retrieved 1 February 2017. 
  3. ^ "3' E36 318i Uncoded DME control unit". www.realoem.com. 27 October 1975. Retrieved 1 February 2017. 
  4. ^ a b "BMW M40 and M43 Four Cylinder Engines". www.unixnerd.demon.co.uk. Retrieved 10 February 2017. 
  5. ^ "BMW Heaven Specification Database | Engine specifications for M40 engines". www.bmwheaven.com. Retrieved 2012-05-29. 
  6. ^ a b Roy McNeill, Copyright BMW World 1999–2005. "BMW World – 4-Cylinder Engines". Usautoparts.net. Retrieved 2012-05-29. 

See also[edit]