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M20B20 1986-1991 320i
SOHC 12 Valve 2.0l 1990 cc Inline 6 Cylinder
HP: 125 @ 5800, 129 @ 6000 (Motronic)
TQ: 170 Nm @ 4000, 174 Nm @ 4000 rpm (Motronic)
Bore: 80 mm / 3.149 in
Stroke: 66 mm / 2.598 in
Compression ratio: 9.8:1
Rod length: 130mm
Rod big end bore: 45 mm / 1.772 in
Crank rod journal: 21.8 mm / .858 in
Piston comp height:
Piston Dome/Dish:
Int valve dia: 40mm
Ex valve dia: 34mm
Cam shaft Specs:
M20B23 1982-1986 323i
SOHC 12 Valve 2.3l 2315 cc Inline 6 Cylinder
HP: 139 @ 5800 (83-84) 150 @ 6000 (>85)
TQ: 205 Nm @ 4000
Bore: 80 mm / 3.149 in
Stroke: 76.8 mm / 3.024 in
Compression ratio: 9.8:1
Rod length: 130mm
Rod big end bore: 45 mm / 1.772 in
Crank rod journal: 21.8 mm / .858 in
Piston comp height: 38mm
Piston Dome/Dish:
Int valve dia: 40mm
Ex valve dia: 34mm
Cam shaft Specs:
M21 Diesel Diesel & Turbo Diesel - 1987-1991 - touring 1988-1992
SOHC 12 Valve 2443 2.4l Inline 6 cylinder
HP: 86 @ 4600 (d) 115 @ 4800 (td)
TQ: 112 @ 2500 (d) 162 @ 2400 (td)
Bore: 80 mm / 3.149 in
Stroke: 81 mm / 3.189 in
Compression ratio: 22.0:1
Rod length:
Rod big end bore: 45 mm / 1.772 in
Crank rod journal: 21.8 mm / .858 in
Piston Dome/Dish:
Int valve dia:
Ex valve dia:
Cam shaft Specs:
M20B25 1987-1991 325i/is/ix/ic (1992 for cabrio)
SOHC 12 valve 2.5l 2494cc inline 6 Cylinder (84-87) Motronic 1.1 (88-92)
HP: 168 hp @ 5800
TQ: 222 Nm (164 Lbft) @ 4300
Bore: 84 mm / 3.311 in
Stroke: 75 mm / 2.953 in
Compression ratio: 8.8:1 (cat only 87-90), 9.7:1 (euro only 85-89)
Rod length: 135 mm / 5.315 in
Rod big end bore: 45 mm / 1.772 in
Crank rod journal: 21.8 mm / .858 in
Piston comp height: 34.2 mm / 1.346 in
Piston Dome/Dish:
Int valve dia: 42 mm / 1.654 in
Ex valve dia: 36 mm / 1.417 in
Cam shaft Specs:
M20B27 1984-1988 325/e/es
SOHC 12 valve 2.7l 2693cc Inline 6 Cylinder BOSCH Motronic (84-87) Motronic 1.1 (88)
HP:122 @ 4250 / 127 @ 4800 (super eta)
TQ: 230 @ 3200
Bore: 84 mm / 3.311 in
Stroke: 81 mm / 3.189 in
Compression ratio: 9.0:1 (82-87), 8.5:1 (super ETA 87-88)
Rod length: 130 mm / 5.118 in
Rod big end bore: 45 mm / 1.772 in
Crank rod journal: 21.8 mm / .858 in
Piston comp height: 35.7 mm / 1.406 in (82-87), 36.2 mm / 1.425 in (super ETA 87-88)
Piston Dome/Dish:
Int valve dia:
Ex valve dia:
Cam shaft Specs:
S14 1988-1991 M3
DOHC 16 Valve 2.3l 2302 cc cc Inline 4 Cylinder BOSCH Motronic
HP: 192 @ 6750
TQ: 170 @ 4750
Bore: 93.4 mm
Stroke: 84 mm
Compression ratio: 10.5:1
Rod length: 144 mm / 5.670 in
Rod big end bore: 48 mm / 1.890 in
Crank rod journal: 21.8 mm / .858 in
Piston Dome/Dish:
Int valve dia: 37mm
Ex valve dia: 32mm
Cam shaft Specs:
M10B18 1985-1986 318i
SOHC 1.8l 1766cc inline 4 Cylinder
HP: 105 @ 5800
TQ: 103 @ 4500
Bore: 89 mm
Stroke: 80 mm
Compression ratio: 9.3:1
Rod length: 5.315 in
Rod big end bore: 52 mm / 2.047 in
Crank rod journal: 23.9 mm / .940 in
Piston Dome/Dish:
Int valve dia:
Ex valve dia:
Cam shaft Specs:
M40B16 1988 316i/is
SOHC 1.6l 1596cc inline 4 Cylinder Bosch DME M1.3
HP:102 @ 5800
TQ: 103 @ 4500
Bore: 84 mm
Stroke: 72 mm
Compression ratio: 8.2:1
Rod length:
Rod big end bore:
Crank rod journal:
Piston Dome/Dish:
head colume:
Int valve dia:
Ex valve dia:
Cam shaft Specs:
M40B18 1987 318i
SOHC 8 Valve 1.8l 1796cc inline 4 Cylinder Bosch DME M1.3
HP: 115 @ 5500
TQ: 122 @ 4250
Bore: 84 mm
Stroke: 81 mm
Compression ratio: 8.8:1
Rod length:
Rod big end bore: 45 mm / 1.772 in
Crank rod journal:
Piston Dome/Dish:
Int valve dia:
Ex valve dia:
Cam shaft Specs:
M42B18 1989 318i/is/ic
DOHC 16 valve 1.8l 1794 cc inline 4 Cylinder engine Bosch DME M1.7
HP: 136 @ 6000
TQ: 127 @ 4600
Bore: 84 mm
Stroke: 81 mm
Compression ratio: 10.0:1
Rod length: 140 mm / 5.512 in
Rod big end bore: 1.890 in
Crank rod journal: .858 in
Piston Dome/Dish:
Int valve dia:
Ex valve dia:
Cam shaft Specs:
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