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US BMW Chassis Designations

2-Series 1602, 2002, 2002tii
3-Series
E21 (1977-1983) 320i
E30 (1984-1991) 318i, 318is, 325, 325e, 325es, 325i, 325is, 325iC, 325ix, M3, Z1
E36 (1992-1999) 318i, 318is, 318ti, 325i, 325is, 325iC, 328i, 328is,328iC, M3, Z3
E46 (1999-) 323i, 323ci, 328i, 328ci, Touring
5-Series
E12 (1975-1981) 530i, 528i
E28 (1981-1988) 524td, 528e, 533i, 535i, 535is, M5
E34 (1989-1995) 525i, 530i, 535i, 540i, M5, Touring
E39 (1997-) 528i, 540i
6-Series
E24 630csi, 633csi, 635csi, M6, L6
7-Series
E23 (1977-1987) 733i, 735i, L7
E32 (1988-1994) 735i, 735iL, 740i, 740iL, 750 iL
E38 (1995-) 740i, 740iL, 750iL
8-Series
E31 840Ci, 850i, 850Ci, 850CSi
Engine Designations

M10 4 Cyl, 1.8 & 2.0 liters
2002 1968-1976
320i 1977-1983
318i 1984-1985
M20 6 Cyl, 2.0, 2.3, 2.5 & 2.7 liters
i: Higher HP and RPM
e: Lower RPM, higher Torque
e (2.7)
  325, e, es 1984-1988
  528e 1982-1988
i (2.0, 2.3, 2.5)
  320/6 1978-1991
  323i 1978-1991
  325i, s, iC 1987-1991
  525i 1989-1990
M30 6 Cyl, 2.8, 3.0, 3.3 & 3.5 liter
530i 1975-1979
528i 1980-1981
533i 1982-1984
535i 1985-1993
633csi 1979-1984
635csi 1985-1989
730i 1977-1981
733i 1981-1984
735i, iL 1985-1992
M42 4 Cyl, 1.8 liter, 16 valve
318i, is, ti 1991-1995
M44 4 Cyl, 1.9 liter, 16 valve
318i, is, ti 1996-1997
Z3 1996-
M50 6 Cyl, 2.5 liter, 24 valve
525i 1991-1996
325i, is, iC 1992-1995
M52 6 Cyl, 2.8 liter, 24 valve
528i 1997-
328i, is, iC 1996-1999
M60 8 Cyl, 3.0 & 4.0 liter, 32 valve
730i, iL 1993-1994
740i, iL 1993-1995
530i 1993-1994
540i 1995
840Ci 1994-1995
M62 8 Cyl, 4.4 liter, 32 valve
740i, iL 1996-
540i 1996-
840Ci 1996-1998
M70 12 Cyl, 5.0 liter
750i, iL 1988-
850i, Ci 1991-
M73 12 Cyl, 5.4 liter
750i, iL 1988-
850i, Ci 1991-
M88 6 Cyl, 24 valve
M5 1988
M6 1988-1989
S14 4 Cyl, 2.3 liter, 16 valve
M3 1988-1991
S38 6 Cyl, 3.6 & 3.8 liter, 24 valve
M5 1991-1993
S50 6 Cyl, 3.0 liter, 24 valve
M3 1995
S52 6 Cyl, 3.2 liter, 24 valve
M3 1996-1999
S70 12 Cyl, 5.6 liter
850CSi 1993-1994

Taken from the Bluegrass Bimmers newsletter