BMW M10
| BMW M10 | |
|---|---|
 BMW M10 engine inside | |
| Overview | |
| Manufacturer | BMW |
| Production | 1962–1988 |
| Combustion chamber | |
| Configuration | SOHC Straight-4 |
| Chronology | |
| Successor | BMW M40 |
The BMW M10 was a straight-4 SOHC piston engine produced from 1962 to 1988 with displacements ranging from 1499 cc to 1990 cc. The engine was a commercial success for the Bavarian carmaker, with over 3.5 million produced in almost three decades across many BMW models.[1] It was also used as the basis for the turbocharged BMW M12 motorsport engine, which for instance was used by Brabham-BMW in the Formula One racing series.
History
The engine was designed by engineer and race driver Baron Alex von Falkenhausen.[1] In the late 1950s, he was asked to design a small-displacement (1.3 L) engine, but felt that this would be insufficient for the company's future needs. Therefore, he convinced BMW that the capacity should be 1.5 L instead and he designed a block that could be expanded to 2.0 L in the future.
The BMW M40 series of engines replaced the M10 in the late 1980s.
Models
| Model | Displacement | Power | Torque | Redline | Year |
|---|---|---|---|---|---|
| M115 | 1,499 cc (91.5 cu in) | 56–60 kW (76–82 PS; 75–80 hp) | 1962–1977 | ||
| M98 | 1,573 cc (96.0 cu in) | 56 kW (76 PS; 75 hp) | 149 N·m (110 lb·ft) | 1981 | |
| M118 | 1,766 cc (107.8 cu in) | 67 kW (91 PS; 90 hp) | 150 N·m (111 lb·ft) | 1963–1973 | |
| M41 | 1,573 cc (96.0 cu in) | 67 kW (91 PS; 90 hp) | 167 N·m (123 lb·ft) | 1975 | |
| M10 | 1,766 cc (107.8 cu in) | 73 kW (99 PS; 98 hp) | 1964–1975 | ||
| M10B18 | 1,766 cc (107.8 cu in) | 75 kW (102 PS; 101 hp) @ 5,800 rpm | 140 N·m (103 lb·ft) @ 4,500 rpm | 1985–1988 | |
| M10B18 | 1,766 cc (107.8 cu in) | 77 kW (105 PS; 103 hp) @ 5,800 rpm | 145 N·m (107 lb·ft) @ 4,500 rpm | 1980 | |
| M116 | 1,573 cc (96.0 cu in) | 78 kW (106 PS; 105 hp) | 1964–1975 | ||
| M43/1 | 1,990 cc (121.4 cu in) | 81 kW (110 PS; 109 hp) | 1975 | ||
| M17 | 1,990 cc (121.4 cu in) | 86 kW (117 PS; 115 hp) | 1972 | ||
| M05 | 1,990 cc (121.4 cu in) | 90 kW (122 PS; 121 hp) | 167 N·m (123 lb·ft) | 1965–1976 | |
| M64 | 1,990 cc (121.4 cu in) | 93 kW (126 PS; 125 hp) | 1964–1975 | ||
| M15 | 1,990 cc (121.4 cu in) | 96 kW (131 PS; 129 hp) | 177 N·m (131 lb·ft) | 1972–1974 | |
| M31 | 1,990 cc (121.4 cu in) turbocharged | 125 kW (170 PS; 168 hp) | 240 N·m (177 lb·ft) | 1974 |
Naming conventions
The engine was initially known as the "M115" (the last two digits representing the 1.5 litre capacity). Over the years, variants of the engine were given various codes (most of them starting with "M1..." and the remaining digits relating to the capacity). In 1975, the engine became known as then "M10", then in 1980 it was given the standardised BMW engine code of M10B18 (where "M10" represents the series and the "18" represents the 1.8 litre capacity).
The M115 and all related engines have become retrospectively known as the "M10" family.
M115
The 1.5 L (1499 cc/91 in3) M115 produced 75 hp or 80 hp (56 kW or 60 kW) (depending on carburetor).
Applications:
M118
The 1.8 L (1773 cc/108 in3) M118 produced 90 hp (67 kW) and 143 to 150 Nm of torque.
Applications:
M116
The 1.6 L (1573 cc/95 in3) M116 produced 75 hp (56 kW). Bore was 84 mm and stroke was 71 mm.
Applications:
- 1964-1966 BMW 1600
- 1966-1975 BMW 1600-2/1602
M05
The 2.0 L (1990 cc/121 in3) M05 produced 100 hp to 120 hp (75 to 90 kW) and 157 to 167NM of torque . Bore was 89 mm and stroke was 80 mm.
Applications:
M15
The 2.0 L (1990 cc/121 in3) M15 produced 130 hp (96 kW) and 131 lb·ft (177 N·m). It was the famed tii engine.
Applications:
- 1972-1974 BMW 2002tii
M17
The 2.0 L (1990 cc/121 in3) M17 produced 115 hp (86 kW).
Applications:
M31
The 2.0 L (1990 cc/121 in3) M31 was turbocharged and produced 170 hp (125 kW) and 177 lb·ft (250 N·m).
Applications:
- 1974 E20 2002 turbo
M41
The 1.6 L (1573 cc/95 in3) M41 produced 90 hp (67 kW) and 123 lb·ft (167 N·m).
Applications:
M64
The 2.0 L (1990 cc/121 in3) M64 produced 125 hp (93 kW).
Applications:
M43/1
The 2.0 L (1990 cc/121 in3) M43/1 produced 109 hp (81 kW).
Applications:
M10
The 1.8 L (1766 cc/107 in3) M10 produced 98 hp (73 kW).
Applications:
M98
The 1.6 L (1573 cc/95 in3) M98 produced 75 hp (56 kW) and 110 lb·ft (149 N·m).
Applications:
M10B18
- L-Jetronic Fuel Injection
- Displacement 107.8 CI 1,766 cc
- 101 hp (75 kW) @5,800 rpm
- 103 lb·ft (140 Nm) @4,500 rpm
- Compression: 9.0:1
- Stroke 2.79 in (71 mm)
- Bore 3.50 in (89 mm)
- Firing order 1, 3, 4, 2
Applications:
- 1980 E12 518
- 1980 E21 316
- 1980 E28 518
- 1981 E12/8 518i (South Africa Only)
- 1980 E21 318i
- 1983 E30 318i
- 1980 E28 518i
- 1983 E30 316
- 1983 E28 518
- 1987/1988 E30 316i
M10B18 had an 89 mm bore and 71 mm stroke. Also, in E30 as 318i, very unusual for that time, it could stretch the 2nd gear all the way to 100 km/h.
Performance variants
M12 turbocharged motorsport version
The M10 was used as the basis for the highly successful M12 turbocharged motorsport engine.
S14 version
The S14 engine for the E30 BMW M3 was based upon the M10 block.[2]
References
- 1 2 Roy McNeill, Copyright BMW World 1999-2005. "BMW World - M10 Engine". Usautoparts.net. Retrieved 2012-05-29.
- ↑ "3 Series – E30". BMW History. Retrieved 2012-11-07.
External links
- The UnixNerd's BMW M10 engine page with photos, history and common problems.
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| 4-cylinder petrol | M10 >> | ||||||||||||||||||||||||||||||||||||||||
| 6-cylinder petrol | M337 | ||||||||||||||||||||||||||||||||||||||||
| << M78* | M30 >> | ||||||||||||||||||||||||||||||||||||||||
| M20 >> | |||||||||||||||||||||||||||||||||||||||||
| M88 / M90 >> | |||||||||||||||||||||||||||||||||||||||||
| 8-cylinder petrol | OHV V8 | ||||||||||||||||||||||||||||||||||||||||
| *made in East Germany as EMW | |||||||||||||||||||||||||||||||||||||||||