Fiat 128 SOHC engine

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Fiat SOHC engine
Overview
Manufacturer	Fiat Lancia Zastava Automobiles Tofaş
Also called	Fiat Torque engine
Production	1969–2010
Layout
Configuration	Inline-4
Displacement	1.1–1.8 L (1,116–1,839 cc)
Cylinder bore	80–86.4 mm (3.15–3.40 in)
Piston stroke	55.5–78.4 mm (2.19–3.09 in)
Cylinder block material	Iron
Cylinder head material	Aluminium
Valvetrain	SOHC 2 valves x cyl. DOHC 4 valves x cyl.
Combustion
Turbocharger	In some versions
Fuel system	Weber carburetor Multi-point fuel injection Single-point injection
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	55–133 hp (41–99 kW)
Chronology
Successor	Fiat Pratola Serra engine E.torQ engine FIRE Turbojet/Multiair engine

Designed by Aurelio Lampredi, the Fiat SOHC engine first appeared in the front-wheel drive (FWD) Fiat 128 of 1969.^[1] The in-line four-cylinder engine comprised an iron block with an aluminium cylinder-head containing a single overhead camshaft operating directly on both the inlet and exhaust valves in a reverse-flow cylinder-head configuration. The camshaft was driven by a toothed belt rather than chain. The engine remained in production until about 2010 and grew in capacity over the years from 1100 cc (in the Fiat 128) to an eventual 1900 cc (in the Fiat Linea). The Fiat 130 2.9 L (2,866 cc) V6 engine, also appearing in 1969, although having crossflow cylinder head, is directly related to the 128 SOHC engine, but with a 1.20 upscale in bore and stroke. The 128 SOHC engine was gradually replaced by the Pratola Serra engine series starting from 1995, and in the 1100 cc guise, by the FIRE unit of comparable displacement. It was also converted to use a multivalve DOHC head, giving birth to the Torque engine, used until 2005.