Fiat SOHC - Engine Specification

Engine Specification

The Fiat SOHC engine was produced in a number of configurations differing in stroke and bore but maintaining a standard bore-spacing. The first generation of 128 derived engines used a stroke of 55.5 mm and a bore of 80 mm to produce a displacement of 1116 cc. The bore was increased to 86 mm (maintaining the 55.5 mm stroke) to give a displacement of 1290 cc for the X1/9. The original 1290 cc 128/X1/9 engine is the only one of the family to have used the 86 mm bore. The second generation used bores of either 80 mm or 86.4 mm with strokes of 55.5 mm or 63.9 mm giving four possible engine capacities. The final generation of SOHC engines standardised on a longer 67.4 mm stroke with either an 80.5 mm or 86.4 mm bore (giving 1372 cc and 1581 cc respectively).

Valid engine bore/stroke combinations

Stroke (mm)	Bore (mm)
Stroke (mm)	80	80.5	86	86.4
55.5	1116	1130	1290	1302	Capacity (cc)
63.9	1285	1301	1485	1499
67.4	1355	1372	1566	1581

Key
1st Generation
1st & 2nd Generation
2nd Generation
3rd Generation

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**Engine specification (by engine-number)**
Engine Code	Bore (mm)	Stroke (mm)	Capacity (cc) stated	Capacity (cc) calculated	Production (from - to)	BHP	Notes
128.A.000	80	55.5	1116	1116	1969–1982	55-65	128
128.A1.000	86	63.9	1498	1485	1978 - ?	75-85	128
128.AS.000	86	55.5	1290	1290	1972–1978	75	X1/9 1300
138.A.000	80	55.5	1116	1116	1978–1985	60	Ritmo 60
138.A1.000	86.4	55.5	1301	1302	1978–1982	75-65	Ritmo 65
138.A2.000	86.4	63.9	1498	1499	1978–1982	75-85	X1/9 1500, Ritmo 75
138.A3.000	86.4	55.5	1301	1302	1982	75	Ritmo S75
138.A4.000	86.4	63.9	1498	1499	1980–1982	75-85	X1/9 1500, Ritmo S85
138.A5.000	86.4	55.5	1301	1302	1982–1985	70	Also 138.AS.000
138.B.000	80	55.5	1116	1116	1983–1985	55	Uno 55
138.B1.000	80	55.5	1116	1116	1982–1985	55-58	Ritmo Mk II
138.B2.000	86.4	55.5	1301	1302	1983–1986	68-70	Uno 70
138.B3.000	86.4	63.9	1498	1499	1982–1985	70-85	-
146.A4.048	80	55.5	1116	1116	1985–1989	58,5	Uno 60
146.A2.000	80	63.9	1301	1285	1985–1989	105	Uno Turbo Mk I (specification A)
146.A2.000	86.4	55.5	1301	1302	1985–1989	105	Uno Turbo Mk I (specification B)
146.A8.000	80.5	67.4	1372	1372	1989	112	Uno Turbo Mk II
146.C1.000	80.5	67.4	1372	1372	1989–1993	72	Uno 70SX
149.C1.000	86.4	63.9	1498	1499	1988	75	Uno 75 SX i.e. (cat)/Selecta
159.A2.000	80.5	67.4	1372	1372	1990–1993	76	Tipo/Tempra 1.4 (carb & i.e.)
159.A3.000	86.4	67.4	1581	1581	1990–1996	75-86	Tipo/Tempra 1.6 (carb & i.e.)
160.A1.000	80.5	67.4	1372	1372	1988–1993	72	Tipo/Tempra 1.4 i.e.
160.A1.046	80.5	67.4	1372	1372	1992–1993	69	Uno Selecta
160.A2.000	86.4	67.4	1580	1581	1988–1993	83	Tipo/Tempra 1.6 (carb & i.e.)
176.A4.000	80.5	67.4	1372	1372	1993–1995	136	Mk I Punto GT (GT1), CR 7.8:1
176.A4.000	80.5	67.4	1372	1372	1995–1997	133	Mk I Punto GT (GT2), CR 7.8:1
176.B6.000	80.5	67.4	1372	1372	1997–1999	130	Mk I Punto GT (GT3), CR 9.0:1
176.A9.000	86.4	67.4	1581	1581	1994–1997	88	Mk I Punto Sporting & Cabrio
835.xx.xxx	86.4	67.4	1581	1581	1989–1994	75-77	Lancia Dedra (1.6)
835.A1.000	86.4	67.4	1581	1581	1995–1997	90	Lancia Dedra (1.6 i.e.)
182.A4.000	86.4	67.4	1581	1581	1995–2002	103	DOHC 16v, Bravo/Brava/Marea/Multipla/Lancia Dedra 1.6 16v
182.B6.000	80.5	78.4	1596	1596	2002–2005	103	DOHC 16v, Marea/Multipla/Stilo

Key
1st Generation
2nd Generation
3rd Generation

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