BMW piston sizes - Size charts

marka model piston sizes

Below is data on piston parameters for modifications of cars of different years of manufacture.

Main piston parameters:

Piston parameters include more than 15 sizes, the main ones are as follows:

Diameter: nominal piston diameter;
Height: piston height;
Compression height;
Groove height: first and second ring groove height;
Oil control ring groove height;
Cylinder gap: acceptable gap between cylinder and piston ring;
Piston pin diameter;
Ring height.

Note:

When piston is worn out, the gap between skirt and cylinder, piston upper groove erasing, skirt scoring, cracks and deformation of partitions between rings may occur.

Important: item parameters and sizes of different manufacturers can slightly differ.

Piston - full drawing

General BMW 7er piston parameters

General view General view	Piston stroke min Piston stroke min Minimum value of parameter Piston stroke for all marka model modifications. Data is given in (mm).	Piston stroke max Piston stroke max Maximum value of parameter Piston stroke for all marka model modifications. Data is given in (mm).	Modifications Total number of all marka model modifications presented in our database
(General view)	67.6 (mm)	93 (mm)	142

marka model piston parameters

Parameter Piston parameter Data is given for cars of various modifications and years of manufacture	Value Piston value Data is given for cars of various modifications and years of manufacture
730 →08.1979 M30 B30 B
Engine brand	M30 B30
730 3.0 (S) 04.1976→08.1979 M30 B30 V B
Engine brand	M30 B30
732 i →08.1986 M30 B32 B
Engine brand	M30 B32
732i 3.2 (USA) 05.1977→1983 M30 B32 LU B
Engine brand	M30 B32 LU
733 i →12.1981 M30 B32 B
Engine brand	M30 B32
733 i →12.1984 M30 B32 B
Engine brand	M30 B32
733 i →08.1986 M30 B32 B
Engine brand	M30 B32
733i 3.2 (USA) 05.1977→08.1979 M30 B32 LU B
Engine brand	M30 B32 LU
735 i 09.1979→10.1984 M30 B35 (Motronic,9.) B
Engine brand	M30 B35 (Motronic,9.)
735 i 10.1984→08.1986 M30 B35 (Motronic,10) B
Engine brand	M30 B35 (Motronic,10)
735 i →08.1986 M30 B35 (Motronic) B
Engine brand	M30 B35 (Motronic)
I (E23) 728 2.8 MT (1977 - 1979)
Piston stroke	84 (mm)
Compression ratio	10.2
I (E23) 728i 2.8 AT (1978 - 1986)
Piston stroke	84 (mm)
Compression ratio	10.2
I (E23) 728i 2.8 MT (1978 - 1986)
Piston stroke	84 (mm)
Compression ratio	10.2
I (E23) 730 3.0 AT (1977 - 1979)
Piston stroke	80 (mm)
Compression ratio	9
I (E23) 730 3.0 MT (1977 - 1979)
Piston stroke	80 (mm)
Compression ratio	9
I (E23) 733i 3.2 AT (1979 - 1986)
Piston stroke	80 (mm)
Compression ratio	9.3
I (E23) 733i 3.2 AT (1977 - 1979)
Piston stroke	80 (mm)
Compression ratio	9.3
I (E23) 733i 3.2 MT (1979 - 1986)
Piston stroke	80 (mm)
Compression ratio	9.3
I (E23) 733i 3.2 MT (1977 - 1979)
Piston stroke	80 (mm)
Compression ratio	9.3
I (E23) 735i 3.4 AT (1985 - 1986)
Piston stroke	86 (mm)
Compression ratio	9
I (E23) 735i 3.4 AT (1985 - 1986)
Piston stroke	86 (mm)
Compression ratio	9
I (E23) 735i 3.4 AT (1982 - 1986)
Piston stroke	86 (mm)
Compression ratio	9
I (E23) 735i 3.4 MT (1985 - 1986)
Piston stroke	86 (mm)
Compression ratio	9
I (E23) 735i 3.4 MT (1985 - 1986)
Piston stroke	86 (mm)
Compression ratio	9
I (E23) 735i 3.4 MT (1982 - 1986)
Piston stroke	86 (mm)
Compression ratio	9
I (E23) 735i 3.5 AT (1979 - 1986)
Piston stroke	84 (mm)
Compression ratio	9.3
I (E23) 735i 3.5 MT (1979 - 1986)
Piston stroke	84 (mm)
Compression ratio	9.3
I (E23) 745i 3.2 AT (1980 - 1983)
Piston stroke	80 (mm)
Compression ratio	10
I (E23) 745i 3.2 MT (1980 - 1983)
Piston stroke	80 (mm)
Compression ratio	10
I (E23) 745i 3.4 AT (1983 - 1986)
Piston stroke	86 (mm)
Compression ratio	9
I (E23) 745i 3.4 MT (1983 - 1986)
Piston stroke	86 (mm)
Compression ratio	9
II (E32) 730i 3.0 AT (1986 - 1994)
Piston stroke	80 (mm)
Compression ratio	9
II (E32) 730i 3.0 AT (1986 - 1994)
Piston stroke	80 (mm)
Compression ratio	9
II (E32) 730i 3.0 AT (1992 - 1994)
Piston stroke	67.6 (mm)
Compression ratio	10.5
II (E32) 730i 3.0 MT (1986 - 1994)
Piston stroke	80 (mm)
Compression ratio	9
II (E32) 730i 3.0 MT (1986 - 1994)
Piston stroke	80 (mm)
Compression ratio	9
II (E32) 730i 3.0 MT (1992 - 1994)
Piston stroke	67.6 (mm)
Compression ratio	10.5
II (E32) 735i 3.4 AT (1986 - 1992)
Piston stroke	86 (mm)
Compression ratio	9
II (E32) 735i 3.4 AT (1986 - 1987)
Piston stroke	86 (mm)
Compression ratio	9
II (E32) 735i 3.4 AT Long (1986 - 1992)
Piston stroke	86 (mm)
Compression ratio	9
II (E32) 735i 3.4 MT (1986 - 1992)
Piston stroke	86 (mm)
Compression ratio	9
II (E32) 735i 3.4 MT (1986 - 1987)
Piston stroke	86 (mm)
Compression ratio	9
II (E32) 735i 3.4 MT Long (1986 - 1992)
Piston stroke	86 (mm)
Compression ratio	9
II (E32) 740i 4.0 AT (1992 - 1994)
Piston stroke	80 (mm)
Compression ratio	10
II (E32) 740i 4.0 AT Long (1992 - 1994)
Piston stroke	80 (mm)
Compression ratio	10
II (E32) 750i 5.0 AT (1987 - 1994)
Piston stroke	75 (mm)
Compression ratio	8.8
II (E32) 750i 5.0 AT Long (1987 - 1994)
Piston stroke	75 (mm)
Compression ratio	8.8
III (E38) 725d 2.5d AT (1995 - 2001)
Piston stroke	82.8 (mm)
Compression ratio	22
III (E38) 725d 2.5d MT (1995 - 2001)
Piston stroke	82.8 (mm)
Compression ratio	22
III (E38) 728i 2.8 AT (1995 - 2001)
Piston stroke	84 (mm)
Compression ratio	10.2
III (E38) 728i 2.8 MT (1995 - 2001)
Piston stroke	84 (mm)
Compression ratio	10.2
III (E38) 728Li 2.8 AT (1995 - 2001)
Piston stroke	84 (mm)
Compression ratio	10.2
III (E38) 730d 2.9d AT (1997 - 2000)
Piston stroke	88 (mm)
Compression ratio	18
III (E38) 730d 2.9d AT (1998 - 2001)
Piston stroke	88 (mm)
Compression ratio	18
III (E38) 730i 3.0 AT (1994 - 1996)
Piston stroke	67.6 (mm)
Compression ratio	10.5
III (E38) 730i 3.0 AT (1994 - 1996)
Piston stroke	67.6 (mm)
Compression ratio	10.5
III (E38) 730i 3.0 MT (1994 - 1996)
Piston stroke	67.6 (mm)
Compression ratio	10.5
III (E38) 730i 3.0 MT (1994 - 1996)
Piston stroke	67.6 (mm)
Compression ratio	10.5
III (E38) 730Li 3.0 AT (1994 - 1996)
Piston stroke	67.6 (mm)
Compression ratio	10.5
III (E38) 730Li 3.0 AT (1994 - 1996)
Piston stroke	67.6 (mm)
Compression ratio	10.5
III (E38) 730Li 3.0 MT (1994 - 1996)
Piston stroke	67.6 (mm)
Compression ratio	10.5
III (E38) 730Li 3.0 MT (1994 - 1996)
Piston stroke	67.6 (mm)
Compression ratio	10.5
III (E38) 735i 3.5 AT (1994 - 2001)
Piston stroke	78.9 (mm)
Compression ratio	10
III (E38) 735i 3.5 AT (1998 - 2001)
Piston stroke	78.9 (mm)
Compression ratio	10
III (E38) 735i 3.5 MT (1994 - 2001)
Piston stroke	78.9 (mm)
Compression ratio	10
III (E38) 735i 3.5 MT (1998 - 2001)
Piston stroke	78.9 (mm)
Compression ratio	10
III (E38) 735Li 3.5 AT (1994 - 2001)
Piston stroke	78.9 (mm)
Compression ratio	10
III (E38) 735Li 3.5 AT (1998 - 2001)
Piston stroke	78.9 (mm)
Compression ratio	10
III (E38) 735Li 3.5 MT (1994 - 2001)
Piston stroke	78.9 (mm)
Compression ratio	10
III (E38) 735Li 3.5 MT (1998 - 2001)
Piston stroke	78.9 (mm)
Compression ratio	10
III (E38) 740d 3.9d AT (1998 - 2001)
Piston stroke	88 (mm)
Compression ratio	18
III (E38) 740i 4.0 AT (1994 - 1996)
Piston stroke	80 (mm)
Compression ratio	10
III (E38) 740i 4.0 MT (1994 - 1996)
Piston stroke	80 (mm)
Compression ratio	10
III (E38) 740i 4.4 AT (1996 - 2001)
Piston stroke	82.7 (mm)
Compression ratio	10
III (E38) 740i 4.4 MT (1996 - 2001)
Piston stroke	82.7 (mm)
Compression ratio	10
III (E38) 740Li 4.0 AT (1994 - 1996)
Piston stroke	80 (mm)
Compression ratio	10
III (E38) 740Li 4.0 MT (1994 - 1996)
Piston stroke	80 (mm)
Compression ratio	10
III (E38) 740Li 4.4 AT (1996 - 2001)
Piston stroke	82.7 (mm)
Compression ratio	10
III (E38) 740Li 4.4 MT (1996 - 2001)
Piston stroke	82.7 (mm)
Compression ratio	10
III (E38) 750i 5.4 AT (1994 - 2001)
Piston stroke	79 (mm)
Compression ratio	10
III (E38) 750Li 5.4 AT (1994 - 2001)
Piston stroke	79 (mm)
Compression ratio	10
IV (E65/E66) 730d 3.0d AT (2005 - 2008)
Piston stroke	90 (mm)
Compression ratio	17
IV (E65/E66) 730i 3.0 AT (2005 - 2008)
Piston stroke	88 (mm)
Compression ratio	10.7
IV (E65/E66) 730Ld 3.0d AT (2005 - 2008)
Piston stroke	90 (mm)
Compression ratio	17
IV (E65/E66) 730Li 3.0 AT (2005 - 2008)
Piston stroke	88 (mm)
Compression ratio	10.7
IV (E65/E66) 735i 4.0 AT (2005 - 2008)
Piston stroke	84.1 (mm)
Compression ratio	10
IV (E65/E66) 740i 4.0 AT (2005 - 2008)
Piston stroke	84.1 (mm)
Compression ratio	10
IV (E65/E66) 740Li 4.0 AT (2005 - 2008)
Piston stroke	84.1 (mm)
Compression ratio	10
IV (E65/E66) 745d 4.4d AT (2005)
Piston stroke	93 (mm)
Compression ratio	17
IV (E65/E66) 745d 4.4d AT (2005 - 2008)
Piston stroke	93 (mm)
Compression ratio	17
IV (E65/E66) 750i 4.8 AT (2005 - 2008)
Piston stroke	88.3 (mm)
Compression ratio	10.5
IV (E65/E66) 750Li 4.8 AT (2005 - 2008)
Piston stroke	88.3 (mm)
Compression ratio	10.5
IV (E65/E66) 760i 6.0 AT (2005 - 2008)
Piston stroke	80 (mm)
Compression ratio	11.3
IV (E65/E66) 760Li 6.0 AT (2005 - 2008)
Piston stroke	80 (mm)
Compression ratio	11.3
IV (E65/E66) 730d 3.0d AT (2001 - 2008)
Piston stroke	90 (mm)
Compression ratio	17
IV (E65/E66) 730i 3.0 AT (2002 - 2008)
Piston stroke	89.6 (mm)
Compression ratio	10.2
IV (E65/E66) 730Ld 3.0d AT (2002 - 2008)
Piston stroke	90 (mm)
Compression ratio	17
IV (E65/E66) 735i 3.6 AT (2001 - 2008)
Piston stroke	81.2 (mm)
Compression ratio	10.5
IV (E65/E66) 735Li 3.6 AT (2001 - 2008)
Piston stroke	81.2 (mm)
Compression ratio	10.5
IV (E65/E66) 740d 3.9d AT (2001 - 2008)
Piston stroke	88 (mm)
Compression ratio	18
IV (E65/E66) 745i 4.4 AT (2001 - 2008)
Piston stroke	82.7 (mm)
Compression ratio	10
IV (E65/E66) 745Li 4.4 AT (2001 - 2008)
Piston stroke	82.7 (mm)
Compression ratio	10
IV (E65/E66) 760i 6.0 AT (2003 - 2008)
Piston stroke	80 (mm)
Compression ratio	11.3
IV (E65/E66) 760i 6.0 AT (2001 - 2008)
Piston stroke	80 (mm)
Compression ratio	11.3
IV (E65/E66) 760Li 6.0 AT (2002 - 2008)
Piston stroke	80 (mm)
Compression ratio	11.3
V (F01/F02/F04) 730d 3.0d AT (2012 - н.в.)
Piston stroke	84 (mm)
Compression ratio	16.5
V (F01/F02/F04) 730d xDrive 3.0d AT 4WD (2012 - н.в.)
Piston stroke	84 (mm)
Compression ratio	16.5
V (F01/F02/F04) 730i 3.0 AT (2012 - н.в.)
Piston stroke	84 (mm)
Compression ratio	10.2
V (F01/F02/F04) 730Ld 3.0d AT (2012 - н.в.)
Piston stroke	84 (mm)
Compression ratio	16.5
V (F01/F02/F04) 730Li 3.0 AT (2012 - н.в.)
Piston stroke	84 (mm)
Compression ratio	10.2
V (F01/F02/F04) 740d 3.0d AT (2012 - н.в.)
Piston stroke	90 (mm)
Compression ratio	16.5
V (F01/F02/F04) 740d xDrive 3.0d AT 4WD (2012 - н.в.)
Piston stroke	90 (mm)
Compression ratio	16.5
V (F01/F02/F04) 740i 3.0 AT (2012 - н.в.)
Piston stroke	84 (mm)
Compression ratio	10.2
V (F01/F02/F04) 740Li 3.0 AT (2012 - н.в.)
Piston stroke	84 (mm)
Compression ratio	10.2
V (F01/F02/F04) 740Li xDrive 3.0 AT 4WD (2012 - н.в.)
Piston stroke	84 (mm)
Compression ratio	10.2
V (F01/F02/F04) 750d xDrive 3.0d AT 4WD (2012 - н.в.)
Piston stroke	90 (mm)
Compression ratio	10
V (F01/F02/F04) 750i 4.4 AT (2012 - н.в.)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) 750i xDrive 4.4 AT 4WD (2012 - н.в.)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) 750Ld xDrive 3.0d AT 4WD (2012 - н.в.)
Piston stroke	90 (mm)
Compression ratio	10
V (F01/F02/F04) 750Li 4.4 AT (2012 - н.в.)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) 750Li xDrive 4.4 AT 4WD (2012 - н.в.)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) 760i 6.0 AT (2012 - н.в.)
Piston stroke	80 (mm)
V (F01/F02/F04) 760Li 6.0 AT (2012 - н.в.)
Piston stroke	80 (mm)
V (F01/F02/F04) Active Hybrid 7 4.4hyb AT (2012 - н.в.)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) Active Hybrid 7L 4.4hyb AT (2012 - н.в.)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) 730d 3.0d AT (2008 - 2012)
Piston stroke	84 (mm)
Compression ratio	16.5
V (F01/F02/F04) 730i 3.0 AT (2009 - 2012)
Piston stroke	84 (mm)
Compression ratio	10.2
V (F01/F02/F04) 730Ld 3.0d AT (2008 - 2012)
Piston stroke	84 (mm)
Compression ratio	16.5
V (F01/F02/F04) 730Li 3.0 AT (2009 - 2012)
Piston stroke	84 (mm)
Compression ratio	10.2
V (F01/F02/F04) 740d 3.0d AT (2009 - 2012)
Piston stroke	90 (mm)
V (F01/F02/F04) 740d xDrive 3.0d AT 4WD (2009 - 2012)
Piston stroke	90 (mm)
V (F01/F02/F04) 740i 3.0 AT (2008 - 2012)
Piston stroke	84 (mm)
Compression ratio	10.2
V (F01/F02/F04) 740Li 3.0 AT (2008 - 2012)
Piston stroke	84 (mm)
Compression ratio	10.2
V (F01/F02/F04) 750i 4.4 AT (2008 - 2012)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) 750i xDrive 4.4 AT 4WD (2009 - 2012)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) 750Li 4.4 AT (2008 - 2012)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) 750Li xDrive 4.4 AT 4WD (2009 - 2012)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) 760i 6.0 AT (2009 - 2012)
Piston stroke	80 (mm)
V (F01/F02/F04) 760Li 6.0 AT (2009 - 2012)
Piston stroke	80 (mm)
V (F01/F02/F04) Active Hybrid 7 4.4hyb AT (2010 - 2012)
Piston stroke	89 (mm)
Compression ratio	10
V (F01/F02/F04) Active Hybrid 7L 4.4hyb AT (2010 - 2012)
Piston stroke	89 (mm)
Compression ratio	10

Warning: the above data are official figures of the manufacturers, however, it should be borne in mind that the information is for reference and does not guarantee unambiguous accuracy.

Other parameters BMW 7er:

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