The following is a list compiled by me over the years:

Horsepower quotes may not always reflect US Rating
If there are two HP numbers, lower HP number generally denotes US rating

M10 - Straight 4 cylinder SOHC 8V. 1966-1987. 83kg 180lbs
Used in 1502, 1600-2, E21 316/318i/320-4, E30 316, 2002, 2002ti, 2002tii and 2002 turbo
1.5 (75bhp), 1.6 (85bhp), 1.8 (90-98bhp), 2.0 (100bhp), 2.0ti (120bhp), 2.0i (125bhp), 2.0tii (130bhp), 2.0turbo (170bhp)

M20 - Straight 6 cylinder SOHC 12V. Baby Six. 1977-1992. 117kg 258lbs
Used in E21 320, E21 320i/6, E28, E30, E34, E21/30 323i, E30 325e and E28 528e
2.0i (129bhp), 2.3i (143bhp), 2.5i (170bhp), 2.7e (125bhp)

Early model

Later model
M30 - Straight 6 cylinder SOHC 12V. Big Six. 1973-1993. 143kg 315lbs
Used in E12 525/528, E28 525i, E23 725i, 2800CS, E28 528i, E23 728i, 3.0CS/i/L, 3.0Si, E12 530i, E23 730i, 3.3Li, 633, 732i, 733i, 535i, 635i, 735i, E12 M535
2.5i (150bhp), 2.8i (184bhp), 3.0 (185-208bhp), 3.3 (200-206bhp), 3.5 (218bhp)

M102 - Straight 6 cylinder SOHC 12V Turbo. Big Six Turbo. 1984-1986. 145kg 320lbs.
Used only in the E23 745i
3.2L or 3.4L Turbo (252bhp)

M40 - Straight 4 cylinder SOHC 8V. Replaced the M10. 1987-1993. 81kg 178lbs
Used in post 87 E30 316i/318i, E34 518i, Pre 93 E36 316i
1.6 (102bhp), 1.8 (122bhp)

M42 - Straight 4 cylinder DOHC 16V. 1989-1996. 100kg 220lbs
Used in E30 and E36 318is, Z3
1.8 (138-142bhp)

M43 - Straight 4 SOHC 8V. 1993-1998. 83kg 183lbs
Used in post-93 E36 316i/318i, E34/39 518i.
1.6 (102bhp), 1.8 (115bhp)

M43TU - Straight 4 SOHC 8V. 1998 on. 83kg 183lbs
Used in E46 318i
1.9 (118bhp)

M44 - Straight 4 DOHC 16V. 1996 on. 102kg 225lbs
Used in E36 318iS, Z3
1.9 (142-150bhp)

M50/M50TU - Straight 6 DOHC 24V/Straight 6 DOHC 24V with Single VANOS. 1989-1998. 136kg 299lbs
Used in E36 320i/325i, E34/39 520i/525i, Variation of this was used in the Early US E36 M3
2.0 (150bhp), 2.5 (192bhp), 3.0 (240bhp) Sometimes referred to as S50US. Engine shares more common parts with M50 than Euro S50, but is a motorsport engine.

M52/M52TU - Straight 6 DOHC 24V with Single VANOS/Straight 6 DOHC 24V with Double VANOS. 1996-2000. Iron Block in US models, Alloy Block in Europe, US Z3s and all E46s. 118kg 260lbs (alloy) 140kg 308lbs
Used in E39 520i/523i/528i, E36 323i/328i, E46 323i/328i, E38 728i, Variation of this was used in late US E36 M3.
2.0 (150bhp), 2.5 (170bhp), 2.8 (193bhp), 3.2 (240bhp) Sometimes referred to as S52. Engine shares more common parts with M52 than Euro S50, but is a motorsport engine.

M54 - Straight 6 DOHC 24V with Dual VANOS. 2000-present. 126kg 277lbs
Used in late model Z3, all E39 and E46 (2000+) six cylinder models
2.0 (150bhp), 2.2 (170bhp), 2.5 (184-192bhp), 2.8 (193bhp), 3.0 (231bhp)

M56 - Straight 6 DOHC 24V Dual VANOS with ULEV. 2002-present. 127kg 280lbs
Used in some E39 and E46 six cylinder models
2.5 (184bhp)

M60 - V8 DOHC 32V. 1992-1996. 146kg 321lbs
Engine blocks were made of Nikasil (Silicone Injected Nickel) which were prone to failure over time. Many have been replaced with the newer Alusil (Silicone injected Aluminum) engines/
Used in E34 530i, E32 730i, 740i, 840i
3.0 (218bhp), 4.0 (286bhp)

M62/M62TU - V8 DOHC 32V/V8 DOHC 32V Single VANOS. 1996-present. Alusil Engine block. Pre 98 engines were non-VANOS. 140kg 308lbs
Used in E38 730i/740i, E39 540i, X5 and 840i
3.5 (235bhp), 4.4L (286bhp), 4.6 (340bhp)

M70 - V12 SOHC 24V. 1988-1994. 155kg 341lbs
Used in E32 750il, 850i
5.0 (300bhp)

M73 - V12 SOHC 24V Single VANOS. 1995-2001. Pre 98 engines were non-VANOS. 150kg 330lbs
5.4L (326bhp)

S14 - Straight 4 DOHC 16V Solid Lifter Valvetrain and Individual Throttle Bodies. 1987-1991. 106kg 234lbs
Used in the E30 M3 and Italian only E30 320is. 2.5L used in Sport Evo III
2.0L (195bhp) 2.3L (192-215bhp), 2.5L (238bhp)

Original S38 (Also known as M88 and M88/3)- Straight 6 DOHC 24V Solid Lifter Valvetrain and Individual Throttle Bodies. 1979-1980, 1986-1990. 146kg 321lbs
Used in M1, E28 M5, M6, SA E23 745i
3.5L (277-286bhp)

Updated S38 - Straight 6 DOHC 24V Solid Lifter Valvetrain and Individual Throttle Bodies. 1988-1996. 151kg 332lbs
Used in E34 M5
3.6 (315bhp), 3.8 (340bhp)

S50 - Straight 6 DOHC 24V Solid Lifter Valvetrain with Single VANOS and Individual Throttle Bodies. (Dual Vanos on 3.2Ls) 1992-2000. 152kg 333lbs
Used in non-US E36 M3 (3.0L) and E36 M3 Evo (3.2L) and non-US Z3 M-coupe/roadster (all 3.2L)
3.0 (286bhp), 3.2L (321bhp)

S54 - Straight 6 DOHC 24V Solid Lifter Valvetrain with Dual VANOS and Individual Throttle Bodies. 2001-2008. 148kg 326lbs
Used in the E46 M3 and the last of the Z3 M-Coupe and M-Roadster.
3.2 (315-343bhp)

S62 - V8 DOHC 32V Solid Lifter Valvetrain with Dual VANOS and Individual Throttle Bodies. 1999-2005 158kg 348lbs
Used in E39 M5 and Z8
4.9L (400bhp)

S65 - V8 DOHC 32V with Dual VANOS and Individual Throttle Bodies. 2007-present. 202kg 445lbs
Used in E90, E92 and E93 M3
4.0L (420bhp)

S70 - V12 SOHC 24V. 1995-1997. 165kg 363lbs
Used in 850CSi
5.6L (380bhp)

[url=http://en.wikipedia.org/wiki/BMW_M70]S70/2 - V12 DOHC 48V Solid Lifter Valvetrain with Single VANOS and Individual Throttle Bodies
Used in McLaren F1 (Was originally developed for M8)[/url]
6.1 (627bhp)

S85 - V10 DOHC 40V Solid Lifter Valvetrain with Double VANOS and Individual Throttle Bodies. 350lbs
Used in BMW E60 M5 and E63 M6
5.0 (400-507bhp depending on iDrive setting)

M21 - straight 6 SOHC 12V Diesel. 1983-1991 126kg 278lbs
Used in 324td, 524d/td
2.4 (112bhp), 2.4 Turbo (115bhp)

M41 - Straight 4 SOHC 8V Diesel. 1994-2000. 108kg 238lbs
Used in E36 318tdS
1.7 Turbo (90bhp)

M51 - Straight 6 SOHC 12V Diesel. 1991-1998. 132kg 291lbs
Used in E36 325td/S, E34 and E39
2.5 Turbo (115bhp), 2.5 Intercooled Turbo (143bhp)

M47 - Straight 4 DOHC 16V Diesel. 1998-2006. 117kg 258lbs
Used in E46 320d
2.0 Turbo (136bhp)

M55 - Straight 6 DOHC 24V Diesel. 2000-on. 132kg 291lbs
Used in E46 and E39s.
2.5 Turbo (170bhp), 3.0 Turbo (183bhp)

M67 - V8 DOHC 32V Diesel. 1999-on. 192kg 423lbs
Used in E38 740d
4.0 Turbo (245bhp)

N44TU - Straight 4 DOHC 16V Dual VANOS with Valvetronic
Used in E46 318i
1.6 (115bhp), 1.8 (143bhp)

N62 - V8 DOHC 32V Dual VANOS with Valvetronic
Used in E65 745i
4.4 (325bhp)

N63 - V8 DOHC 32V Dual VANOS with Valvetronic and Reverse Flow Manifolds utilizing Twin Turbochargers
Used in E71 X6 and F01 750i

N73 - V12 DOHC 48V Dual VANOS with Valvetronic
Used in E65 760i
6.0 (445bhp)

N54 - Straight Six DOHC 24V Dual Vanos with Direct Injection and Twin Turbochargers. 2006-on. 429lbs
Used in E9x 335i (coupe, sedan and convertible)
3.0 (306bhp)

W10 Tritec - Straight 4 SOHC 16V
Used in Mini One, Mini Cooper.
1.6 (90-115bhp)

W11 Tritec - Straight 4 SOHC 16V with Eaton Supercharger
Used in Mini Cooper S
1.6 Supercharged (163bhp)

BMW/PSA Prince - Straight 4 DOHC 16V Non-turbo and Turbo applications
118bhp (Cooper) 170bhp Turbo (Cooper S)

*added S65. Rehosted all photos. added new photos. updated dates of use. added new links.

Modified by Chapel at 1:44 PM 10/19/2009

-Theodore Roosevelt 1907.

-Theodore Roosevelt 1907.

Quote, originally posted by Chapel »

longer stroke, lower revs, different head, different cam. 2.7eta engines are the 'diesel alternative' If you wanna know more, create a thread with exactly what you need to know (in the Engine Swaps forum) and Ill be more than glad to help you out

As soon as I can figure out how to word, in as few words as possible, my questions about interchangability, I'll definately post a thread and take you up on your offer. Many thanks !!

-Theodore Roosevelt 1907.

M52/M52TU - Straight 6 DOHC 24V with Single VANOS/Straight 6 DOHC 24V with Double VANOS. 1996-1999. Iron Block in US, Alloy Block in Europe. 118kg 260lbs (alloy) 140kg 308lbs
Used in E39 520i/523i/528i, E36 323i/328i, E38 728i, Variation of this was used in late US E36 M3.
2.0 (150bhp), 2.5 (170bhp), 2.8 (193bhp), 3.2 (240bhp) Sometimes referred to as S52US. Engine shares more common parts with M52 than Euro S52, but is a motorsport engine.

You might want to add here that the Euro version E36 motors had 6 individual throttles, greater flowing cylinder ports.

By euro version i meant the engine with higher hp and six throttle body as opposed to single. I didn't write euro version S52.

Might want to add that the ZcoupeM cars as of 2001 had the european spec (evo) motor with same components and performance.

Modified by Paghmani at 7:54 AM 2/6/2004

Modified by Paghmani at 7:56 AM 2/6/2004

http://www.supercars.net/cars/....html

Peace.

Modified by Paghmani at 8:01 AM 2/11/2004

Modified by Paghmani at 8:20 AM 2/11/2004