Engine specifikations for the Volvo B18, B20 & B16
All engine types are 4-cylinder, water cooled & OHV.
 
B18
Type B18A
1780 cc (84.14 mm bore X 80 mm stroke).
8.5:1 compression ratio (B18A type 1, to July 1965).
8.7:1 compression ratio (B18A type 2, from August 1965).
One Zenith 36VN carburetor. (B18A type 1).
One Zenith-Stromberg 175 CD carburetor (B18A type 2, early examples) or 175 CDS carburetor (B18A type 2, late examples).
68 bhp at 4,500 rpm (B18A type 1).
75 bhp at 4,700 rpm (B18A type 2).
97.5 lb.ft at 2.600 rpm (B18A type 1).
104.7 lb.ft at 2.300 rpm (B18A type 2).
Fittted to:
Volvo 121 four-door, August 1961 to December 1967
Volvo 121 two-door, October 1961 to July 1968 (known as 131 in some markets)
 
Type B18D
1780 cc (84.14 mm bore X 80 mm stroke).
8.5:1 compression ratio. (B18D type 1).
8.7:1 compression ratio. (B18D type 2 and 3).
Two SU HS6 carburetors.
80 bhp at 5.000 rpm. (B18D type 1).
86 bhp at 5.000 rpm. (B18D type 2).
90 bhp at 5.500 rpm. (B18D type 3).
101 lb.ft at 3.000 rpm. (B18D type 1).
101 lb.ft at 3.500 rpm. (B18D type 2).
104.7 lb.ft at 3.200 rpm. (B18D type 3).
Fittted to:
Volvo 122S four-door, August 1961 to December 1967
Volvo 122S two-door, October 1961 to July 1968 (known as 132S in some markets)
 
Type B18B four-cylinder OHV, with five main bearings.
1780 cc (84.14 mm bore X 80 mm stroke).
10:1 compression ratio.
Two SU HS6 carburetors.
96 bhp at 5.600 rpm.
106.2 lb.ft at 3.600 rpm.
Fittted to:
Volvo 123GT, August 1966 to July 1968
 
B20
Type B20A
1990 cc (88.9 mm bore X 80 mm stroke).
8.7:1 compression ratio.
One Zenith-Stromberg 175 CD-2 SE carburetor.
82 bhp at 4.700 rpm.
115.6 lb.ft at 2.300 rpm.
Fitted to:
Volvo 121 two-door, August 1968 to July 1970
Volvo 221 estate, August 1968 to July 1969
 
Type B20D
1990 cc (88.9 mm bore X 80 mm stroke).
9.x:1 compression ratio, 9.x:1 for some markets.
Two SU HS6 carburetors.
1xx bhp at 5.500 rpm.
1xx lb.ft at 3.500 rpm.
Fitted to:
Volvo 122S two-door, August 1968 to July 1970
Volvo 222 estate, August 1968 to August 1969
 
Type B20B
1990 cc (88.9 mm bore X 80 mm stroke).
9.5:1 compression ratio, 9.3:1 for some markets.
Two SU HS6 carburetors.
100 bhp at 5.500 rpm.
112 lb.ft at 3.500 rpm.
Fitted to:
Volvo 123GT, August 1968 to July 1970
 
Type B20E
1990 cc (88.9 mm bore X 80 mm stroke).
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XXX
Fitted to:
Volvo P1800
Volvo 142
 
Type B20F
1990 cc (88.9 mm bore X 80 mm stroke).
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XXX
Fitted to:
Volvo P1800
Volvo 142
 
B16
Type B16A
main bearings.
1580 cc (79,37 mm bore X 80 mm stroke).
7,4:1 compression ratio.
One Zenith 34VN carburetor.
60 bhp DIN at 4,500 rpm.
81,6 lb.ft at 2,500 rpm.
Fitted to:
Volvo Amazon and 121 saloon, September 1956 to July 1961
 
Type B16B
main bearings.
1580 cc (79,37 mm bore X 80 mm stroke).
8.2:1 compression ratio.
Two SU H4 carburetors.
76 bhp DIN at 5.500 rpm.
83 lb.ft at 2.500 rpm.
Fitted to:
Volvo Amazon S and 122S saloon, March 1958 to July 1961