Engines
1960s
Germany

BMW M10 Engine variants

From 1962 to 1988

 BMW M10 Engine variants From 1962 to 1988

 

Type BMW SOHC Straight-4 Petrol Engine

The BMW M10 is a straight-4 SOHC piston engine produced from 1962 to 1988 with displacements ranging from 1499 cc to 1990 cc. It was first released in the New Class sedans and began to be phased out following the introduction of the M40 engine by 1987.

For mixture preparation of the original 1.5-liter engine with 75 or 80 hp was a single downdraft carburetor . This basic concept was followed by variants with 1.6, 1.8 and 2 liters displacement. With a carburetor, the two-liter engines were on PS 100, with two flat current - twin carburettors equipped models rendered 105-120 hp. The models 2000/2002 tii / 520i with mechanical blowfish injection came to 130 hp. The 1973 presented turbo 2002 reached with exhaust gas turbocharger even 170 hp.

1981 followed for the BMW E28 and a 1766 cc version of the engine with K-Jetronic intake manifold injection. 

End of the 1980s was in the BMW M3 (model E30), the BMW S14 four-valve only on 2.3, then 2.5 liters and already in the production version over 200 hp expanded. The S14 is based on the design on a slightly modified M10 engine block and a shortened cylinder head of the six-cylinder BMW M88 * (which was also used in the BMW M1 ). He had like this single throttle, but an electronic instead of a mechanical injection.

The engine was a commercial success with over 3.5 million produced in almost three decades across many BMW models It has a forged crankshaft, counter balance weights, five main bearings and a chain-driven camshaft. The block is made from cast iron and the head is made from aluminium.

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.

While BMW let it with the series engines until the 1970s with 2 valves per cylinder, came in the course of the European Touring Car Championship Kugelfischer injections with individual throttle or flat valves and four-valve cylinder heads are used. In Formula 2 (where the engines based on the M10 were extremely successful) and the German Racing Championship were already 300 hp possible. During this time, Schnitzer Motorsport also developed a four-valve cylinder head for the BMW M10, all other four-valve engines came from the factory. This was designed primarily for use in touring cars and rally cars of the type BMW 02 .

The engine was designed by engineer and race driver Baron Alex von Falkenhausen. 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. BMW M10 Engine utilized Hemispherical combustion chamber in 8 valve arrangement.

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.

BMW 1500 engine 1970s

BMW 1500 engine

M115

The 1.5 L (1499 cc/91 in3) M115 produced 75 hp or 80 hp (56 kW or 60 kW), depending on the state of tune. Bore is 82 mm (3.2 in), stroke is 71 mm (2.8 in). Lower power models use an 8:1 compression ratio, while higher power models use a ratio of 8.8:1. Fuel is supplied via a Solex 38 PDSI carburettor.

Applications:

  • 1962-1964 BMW 1500
  • 1975-1977 BMW 1502

M10 B16 

M116

The 1.6 L (1573 cc/95 in3) M116 used a Solex 38 PDSI carburettor and produced 63 kW (84 hp). Bore is 84 mm (3.3 in), stroke is 71 mm (2.8 in) and compression ratio is 8.6:1.

Applications:

  • 1964-1966 BMW 1600
  • 1966-1975 BMW 1600-2/1602

A version using twin Solex 40 PHH carburettors and a compression ratio of 9.5:1 produced 78 kW (105 hp)

Applications:

  • 1967-1968 BMW 1600 ti

M41

The 1.6 L (1573 cc/95 in3) M41 produced 67 kW (90 hp) and 123 N·m (91 lb·ft). It has a 8.3:1 compression ratio and fuel is supplied by a Solex 32 DIDTA carburettor.

Applications:

  • 1975 E21 316

M98

The 1.6 L (1573 cc/95 in3) M98 produces 55 kilowatts (74 hp). Fuel is supplied by a Pierburg 1B2 carburettor and the compression ratio is 9.5:1.

Applications:

  • 1981-1983 E21 315

BMW 1800ti Engine

BMW 1800ti Engine

M118

The 1.8 L (1773 cc/108 in3) M118 produces 66–95 kW (89–127 hp), depending on specification, with bore is 84 mm (3.3 in) and stroke is 80 mm (3.1 in).

Applications:

  • 1963-1968 1800: 67 kW (90 hp), 8.6:1 compression, Solex 36-40 PDSI carburettor
  • 1974 E12 518: 67 kW (90 hp), 8.6:1 compression, Solex 38 PDSI carburettor
  • 1963-1966 1800ti: 81 kW (109 hp), 9.5:1 compression, 2x Solex 40 PHH carburettors
  • 1965 1800tiSA: 95 kW (127 hp), 10.5:1 compression, 2x Weber DCOE-45 carburettors

M10B18

The 1.8 L (1766 cc/107 in3) M10B18 produces 74–77 kW (99–103 hp), depending on specification. Bore is 89 mm (3.5 in), stroke is 71 mm (2.8 in).

Applications:

  • 1969-1972 1800: 67 kW (90 hp), 8.6:1 compression, Solex 36-40 PDSI carburettor
  • 1971-1975 BMW 1802: 67 kW (90 hp), 8.6:1 compression, Solex 38 PDSI carburettor
  • 1980-1983 E21 320i/320is (USA): 74 kW (99 hp), 8.8:1 compression, Bosch K-Jetronic EFI
  • 1980-1983 E12 518 (South Africa): 77 kW (103 hp), 10:1 compression, Bosch K-Jetronic EFI
  • 1982-1987 E30 318i: 77 kW (103 hp), 10:1 compression, Bosch L-Jetronic EFI
  • 1981-1988 E28 518i: 77 kW (103 hp), 9.5:1 compression, Bosch LE-Jetronic EFI

BMW 2000 tii Engine x ray view

BMW 2000 tii Fuel injection Engine

M10B20

M05

The 2.0 L (1990 cc/121 in3) M05 has a bore of 89 mm and a stroke of 80 mm. It produces 75–89 kW (101–119 hp), depending on specification.

Applications:

  • 1965-1970 BMW 2000CS: 89 kW (119 hp), 9.3:1 compression, 2x Solex 40 PHH carburettors
  • 1966-1970 BMW 2000C: 75 kW (101 hp), 8.5:1 compression, Solex 40 PDSI carburettor
  • 1966-1972 BMW 2000: 75 kW (101 hp), 8.5:1 compression, Solex 40 PDSI carburettor
  • 1966-1971 BMW 2000ti: 89 kW (119 hp), 9.3:1 compression, 2x Solex 40 PHH carburettors
  • 1968-1976 BMW 2002: 75 kW (101 hp), 8.5:1 compression, Solex 40 PDSI carburettor

M17

The 2.0 L (1990 cc/121 in3) M17 produces 85 kW (114 hp). It has a Stromberg 175 CDET carburettor and a compression ratio of 9.0:1.

Applications:

  • 1972-1977 E12 520

M15

The 2.0 L (1990 cc/121 in3) M15 used the Kugelfischer mechanical fuel injection and produced 97 kW (130 hp). It was the famed tii engine.

Applications:

  • 1970-1973 2000tii
  • 1972-1974 2002tii
  • 1972-1974 E12 520i

M43

The 2.0 L (1990 cc/121 in3) M43/1 has a compression ratio of 8.1:1 and produces 80 kW (107 hp).

Applications:

  • 1975-1979 E21 320 (Solex 32-32 DIDTA carburettor)
  • 1975-1979 E21 320i (USA only, Bosch K-Jetronic EFI)

M64

The 2.0 L (1990 cc/121 in3) M64 has a compression ratio of 9.3:1, uses K-Jetronic fuel injection and produces 93 kW (125 hp).

Applications:

  • 1975-1978 E21 320i
  • 1975-1979 E12 520i

M31

The 2.0 L (1990 cc, 121 in3) M31 used a KKK turbocharger and Kugelfischer P04 mechanical fuel injection with a sliding throttle plate. It has a compression ratio of 6.9:1 and produces 125 kW (168 hp).

Applications:

  • 1973-1975 2002 turbo

Related items
BMW 2000 | BMW 2000C | BMW 1800 | BMW 1600 | BMW 1500 | BMW 02 Series | Petrol Engines | Straight-4 Engines | BMW Straight 4 | BMW Petrol Engines | BMW Engines | BMW 3 Series | BMW 5 Series | Stromberg carburettor

Technical

Technical

  • Technical details and specifications

    BMW Model: 1602 1.6 Engine code: M10 B16 (1967-1975)

    Output: 63 (85) @ 5700rpm
    No. of cylinders Type 4/OHC
    Capacity 1573 cc
    Firing order 1-3-4-2
    Compression ratio 8.6:1
    Suitable for unleaded petrol No
    Fuel system Make Solex Type 38 PDSI Carb-FJ
    Ignition system coil Make Bosch Type 0 221 114 01

    BMW Model: 1800/1802 1.8 Engine code: M10 B18 (1963-1975)

    No. of cylinders Type 4/OHC
    Capacity 1766 cc
    Output: 67 (90) @ 5250 rpm
    Compression ratio 8.6:1
    Suitable for unleaded petrol No
    Minimum octane rating 97 RON
    Ignition system Type SZ
    Fuel system Make Solex
    Fuel System Type 38 PDSI
    Fuel System Carb-FJ
    Ignition coil Make Bosch Type 0 221 102 032

    BMW 2000/2002 2.0 Engine code: M10 B20 (1965-1975)

    Output: 74 (100) @5500rpm
    No. of cylinders Type 4/OHC
    Capacity 1990 cc
    Compression ratio 8.5:1
    Suitable for unleaded petrol No
    Minimum starting voltage 10 V
    Maximum cranking amps 176-215A
    Regulated voltage 13.5-14.2V
    Ignition system Type SZ
    Fuel system Make Solex
    Fuel System Type 40 PDSI/T Carb-FJ
    Fuel pump delivery pressure 0.3 bar
    Ignition coil Make Bosch Type 0 221 119 001
    Distributor Make Bosch No. 0 231 180 005
    Contact breaker gap 0.4 mm

    Models

    ModelDisplacementPowerTorqueYear
    M1151,499 cc (91.5 cu in)54 kW (72 hp)
    @5800 rpm    		118 N·m (87 lb·ft)
    @3700 rpm    		1974–1977
    60 kW (80 hp)
    @5700 rpm    		118 N·m (87 lb·ft)
    @3000 rpm    		1962-1964
    M1161,573 cc (96.0 cu in)63 kW (84 hp)
    @5800 rpm    		130 N·m (96 lb·ft)
    @3500rpm    		1964–1975
    78 kW (105 hp)
    @6000 rpm    		141 N·m (104 lb·ft)
    @4500rpm    		1967–1968
    M4167 kW (90 hp)
    @6000 rpm    		167 N·m (123 lb·ft)
    @4000 rpm    		1975-1980
    M9855 kW (74 hp)
    @5800 rpm    		110 N·m (81 lb·ft)
    @3200 rpm    		1981-1983
    M1181,766 cc (107.8 cu in)67 kW (90 hp)
    @5250 rpm    		144 N·m (106 lb·ft)
    @3000 rpm    		1963–1974
    81 kW (109 hp)
    @5800 rpm    		148 N·m (109 lb·ft)
    @4000 rpm    		1964–1976
    95 kW (127 hp)
    @6100 rpm    		157 N·m (116 lb·ft)
    @5100 rpm    		1965
    M10B1874 kW (99 hp)
    @5800 rpm    		135 N·m (100 lb·ft)
    @35000 rpm    		1980-1983
    77 kW (103 hp)
    @5800 rpm    		145 N·m (107 lb·ft)
    @ 4500 rpm    		1980–1987
    M051,990 cc (121.4 cu in)75 kW (101 hp)
    @5500 rpm    		157 N·m (116 lb·ft)
    @3000 rpm    		1968–1976
    89 kW (119 hp)
    @5600 rpm    		167 N·m (123 lb·ft)
    @3500 rpm    		1965–1971
    M1784 kW (113 hp)
    @5800 rpm    		165 N·m (122 lb·ft)
    @3700 rpm    		1972-1977
    M1597 kW (130 hp)
    @5800 rpm    		177 N·m (131 lb·ft)
    @4500 rpm    		1970–1974
    M4380 kW (107 hp)
    @5800 rpm    		160 N·m (118 lb·ft)
    @3700 rpm    		1975-1983
    M6492 kW (123 hp)
    @5700 rpm    		175 N·m (129 lb·ft)
    @4350 rpm    		1975-1979
    M10B2081 kW (109 hp)
    @5700 rpm    		152 N·m (112 lb·ft)
    @4350 rpm    		1977-1979
    M311,990 cc (121.4 cu in)
    turbo    		125 kW (168 hp)
    @5800 rpm    		245 N·m (181 lb·ft)
    @4000 rpm    		1973-1975