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Engines have codes, too. The codes are 2 or 3 numbers prefixed by a letter like "M" or "S".
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 More on codes...
An "M" means that the engine has
been developed by BMW, while an "S" means that it's an M-engine modified
for extra performance by BMW Motorsport. Following the
letter is a number that identifies the model. BMW usually
specifies the engine designation followed by the engine capacity,
as the M52B25 is the 2.5-liter version of the M52. The "B" in
M52B25 stands for "Benzin", the German word for petrol (UK) or
gasoline (USA), whereas a Diesel engine would use the code "D".
Finally, sometimes you will see an engine code with a suffix, as
the M06 is also known as the M30B25V with the V meaning "Vergasser"
or Carburetor.
Click on the camera for a picture. Click on
the link for more info.
| TYPE |
CYLS |
ENGINE SIZES |
EXAMPLES |
VALVES |
M10
 |
4 |
1.6, 1.8, 2.0 |
2002, 318i, 320i |
8 |
| M20
|
6 |
2.0, 2.3, 2.5, 2.7 |
323i, 325i, 325e, 528e |
12 |
| M21 |
6 |
2.4 |
324d, 524td |
12 |
| M30
|
6 |
2.8, 3.0, 3.3, 3.5 |
5, 6 and 7 Series from 1975-1992 |
12 |
| M40 |
4 |
1.6, 1.8 |
316i, 318i |
8 |
| M41 |
4 |
1.8 |
E36 318tds |
8 |
| M42 |
4 |
1.8 |
318i, is, ti, Z3 |
16 |
| M44
|
4 |
1.9 |
318i, Z3 |
16 |
| M47 |
4 |
1.9 |
320d |
16 |
| M50 |
6 |
2.3, 2.5, 2.8 |
325i, 525i |
24 |
| M50TU |
6 |
2.3, 2.5, 2.8 |
325i, 525i |
24 VaNos |
|
M51 |
6 |
2.5 |
325td,
525tds, 725tds |
12 |
| M52
|
6 |
2.8 |
528i |
24 VaNos |
| M54
|
6 |
3.0 |
X5,
E46,
Z3,
Z4 |
24 Double VaNos |
| M57 |
6 |
3.0 |
530d |
24 |
| M60
|
8 |
3.0, 4.0 |
530i, 540i, 730i, 740i, 840Ci |
32 |
| M62
|
8 |
4.4 |
535i, 540i, 735i, 740i, 840Ci |
32 |
|
M67 |
8 |
3.9 |
740d |
32 |
| M70
|
12 |
5.0 |
750i, 750iL, 850i, 850Ci |
24 |
| M73 |
12 |
5.4 |
750i, 750iL, 850i, 850Ci |
24 |
| M88 |
6 |
3.5 |
M5, M6 |
24 |
| S14
|
4 |
2.3 |
E30 M3 |
16 |
|
S38
|
6 |
3.5 |
M5 |
24 |
| S50 |
6 |
3.0 |
E36 M3 |
24 VaNos |
| S52 |
6 |
3.2 |
E36 M3 |
24 VaNos |
| S54
|
6 |
3.2 |
E46 M3 |
24 VaNos |
| S62
|
8 |
5.0 |
E39 M5 |
48 VaNos |
| S70 |
12 |
5.6 |
850Csi |
24 |
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