Specnically Speaking: B-Series Engine Specs

Engine Code/Type

Vehicle

Year(s)

C/R

Engine Displacement

HP/PS

Bore

Stroke

Head CC's

Con Rod Ratio

Con Rod
Length (mm)

B16A
DOHC Vtec
(JDM)

EF8,9
DA6, 8
EG2,6,9
EK4

89-91
----------
92+

10.2*
------------
10.4*

1587.12

160
------
170

81

77.4

42.7

1.74

134

B16A2, 3
DOHC Vtec
(US)

DelSol Si Vtec
Si Coupe (1999)

93+

10.2*

1587.12

160

81

77.4

42.7

1.74

134

B16B
DOHC Vtec
(JDM only)

EK9/Civic-R

98-00

10.8

1587.12

185

81

77.4

42.7

1.74

approx.
144

B17A1
DOHC Vtec
(US only)

Integra GS-R
(DA)

92-93

9.7.1

1677.81

160

81

81.4

42.7

1.62

131.87

B18A1, B1
DOHC
(US)

Integra
LS/RS/GS/SPL.
(DA, DB, DC)

90-93
----------
94+

9.2

1834.47

140
------
142

81

89

45

1.54

137

B18B
DOHC
(JDM)

Integra ES
( DB)

Mid 1993+

?

1834.47

145

81

89

45

1.54

137

B18C1
(US)

B18C
(JDM)

Integra GS-R
(DB, DC)
--------
Integra
Si-Vtec, SiR-G
(DB, DC)

94-01
----
93.5-00

10.1
----
10.6

1797.36

170
----
180

81

87.2

41.6

1.58

137.9

B18C-5
(US)

B18C
(JDM)

Integra-R
(DB8, DC2)
------
Integra-R
(DB8, DC2)

97-01
----
95.5-01

10.6
----
11.1

1797

195
----
200

81

87.2

42.7

1.58

137.9

B20A3
(US)

Prelude S & 2.0S
(12 valve)

88, 90-91
(no 89 model)

9.0

1958.14

?

81

95

46.3

1.50

142.75

B20A5
(US)

Prelude Si
(12 valve)

88

9.0

1958.14

?

81

95

47.3

1.50

142.75

B20A5
(US)

Prelude Si
(16 valve)

89

9.0

1958.14

?

81

95

47.3

1.50

142.75

B20A5
(US)

Prelude 2.0Si
(16 valve)

90-91

9.0

1958.14

?

81

95

47.3

1.49

141.7

B21A1
(USDM)

Prelude 2.0Si
(16 valve)

90-91

9.4

2056.03

?

83

95

51

1.49

141.7

* 10.2 CR is for ALL US B16A engines from 1992 up till now, including the 99+ Si coupes.
For JDM B16A engines, the 10.2 cr ended in late '91, and was bumped up to 10.4 because of newly used 'P30' pistons used in the 92+ B16 engines. All 92-00 JDM vehicles w/B16A engines have 10.4cr because of the P30 pistons.

Engine Code/Type	Vehicle	Year(s)	C/R	Engine Displacement	HP/PS	Bore	Stroke	Head CC's	Con Rod Ratio	Con Rod Length (mm)
B16A DOHC Vtec (JDM)	EF8,9 DA6, 8 EG2,6,9 EK4	89-91 ---------- 92+	10.2* ------------ 10.4*	1587.12	160 ------ 170	81	77.4	42.7	1.74	134
B16A2, 3 DOHC Vtec (US)	DelSol Si Vtec Si Coupe (1999)	93+	10.2*	1587.12	160	81	77.4	42.7	1.74	134
B16B DOHC Vtec (JDM only)	EK9/Civic-R	98-00	10.8	1587.12	185	81	77.4	42.7	1.74	approx. 144
B17A1 DOHC Vtec (US only)	Integra GS-R (DA)	92-93	9.7.1	1677.81	160	81	81.4	42.7	1.62	131.87
B18A1, B1 DOHC (US)	Integra LS/RS/GS/SPL. (DA, DB, DC)	90-93 ---------- 94+	9.2	1834.47	140 ------ 142	81	89	45	1.54	137
B18B DOHC (JDM)	Integra ES ( DB)	Mid 1993+	?	1834.47	145	81	89	45	1.54	137
B18C1 (US) B18C (JDM)	Integra GS-R (DB, DC) -------- Integra Si-Vtec, SiR-G (DB, DC)	94-01 ---- 93.5-00	10.1 ---- 10.6	1797.36	170 ---- 180	81	87.2	41.6	1.58	137.9
B18C-5 (US) B18C (JDM)	Integra-R (DB8, DC2) ------ Integra-R (DB8, DC2)	97-01 ---- 95.5-01	10.6 ---- 11.1	1797	195 ---- 200	81	87.2	42.7	1.58	137.9
B20A3 (US)	Prelude S & 2.0S (12 valve)	88, 90-91 (no 89 model)	9.0	1958.14	?	81	95	46.3	1.50	142.75
B20A5 (US)	Prelude Si (12 valve)	88	9.0	1958.14	?	81	95	47.3	1.50	142.75
B20A5 (US)	Prelude Si (16 valve)	89	9.0	1958.14	?	81	95	47.3	1.50	142.75
B20A5 (US)	Prelude 2.0Si (16 valve)	90-91	9.0	1958.14	?	81	95	47.3	1.49	141.7
B21A1 (USDM)	Prelude 2.0Si (16 valve)	90-91	9.4	2056.03	?	83	95	51	1.49	141.7
* 10.2 CR is for ALL US B16A engines from 1992 up till now, including the 99+ Si coupes. For JDM B16A engines, the 10.2 cr ended in late '91, and was bumped up to 10.4 because of newly used 'P30' pistons used in the 92+ B16 engines. All 92-00 JDM vehicles w/B16A engines have 10.4cr because of the P30 pistons.