BMW M40
| BMW M40 | |
|---|---|
 | |
| Overview | |
| Manufacturer | BMW |
| Production | 1987–1995 |
| Layout | |
| Configuration | SOHC Straight-4 |
| Displacement |
|
| 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
| Engine | Displacement | Power | Torque | Redline | Year |
|---|---|---|---|---|---|
| M40B16 E36 version |
1.6 L | 75 kW (101 hp) @ 5,500 rpm |
143 N⋅m (105 lb⋅ft) @ 4,250 rpm |
6200 | 1987 |
| M40B16 E30 version |
73 kW (98 hp) @ 5,500 rpm |
141 N⋅m (104 lb⋅ft) @ 4,250 rpm |
6200 | 1991 | |
| M40B18 E36 version |
1.8 L | 85 kW (114 hp) @ 5,500 rpm |
165 N⋅m (122 lb⋅ft) @ 4,250 rpm |
6200 | 1987 |
| M40B18 E30 version |
83 kW (111 hp) @ 5,500 rpm |
162 N⋅m (119 lb⋅ft) @ 4,250 rpm |
6200 | 1991 |
M40B16
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:
- 1988–1994 E30 316i
- 1990–1994 E36 316i
- 1992–1993 Bertone Freeclimber 2
M40B18
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
- ^ "M40 - E30 Zone Wiki". www.e30zone.net. Retrieved 27 January 2017.
- ^ "3' E30 318i Uncoded DME control unit". www.realoem.com. Retrieved 1 February 2017.
- ^ "3' E36 318i Uncoded DME control unit". www.realoem.com. 27 October 1975. Retrieved 1 February 2017.
- ^ a b "BMW M40 and M43 Four Cylinder Engines". www.unixnerd.demon.co.uk. Retrieved 10 February 2017.
- ^ "BMW Heaven Specification Database | Engine specifications for M40 engines". www.bmwheaven.com. Retrieved 2012-05-29.
- ^ 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.
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