{{Infobox automobile engine |image=Tofaş-Fiat 131 A1.000 engine cutup.jpg |caption=131 A1.000 {{convert|1585|cc|L|1|abbr=on|disp=flip}} [[OHV engine]] |name=Fiat 124/OHV engine |manufacturer=[[Fiat]] / [[Fiat#Brazil|Fiat Automóveis]]{{Broken anchor|date=2024-07-17|bot=User:Cewbot/log/20201008/configuration|target_link=Fiat#Brazil|reason=Anchor "Fiat#Brazil" links to a specific web page: "Brazil". }} (Brazil) |production=1966–1999 |configuration =[[Inline-four engine|Inline-4]] |valvetrain=[[Overhead valve engine|OHV]] 2 valves x cyl.<br>[[SOHC]] 2 valve x cyl. |fueltype=Gasoline, [[Diesel engine|Diesel]] |fuelsystem=[[Carburetor]], [[Indirect injection]] |coolingsystem=[[Radiator (engine cooling)|Water-cooled]] |displacement={{convert|1197-1995|cc|L|1|abbr=on|disp=flip}} |bore={{convert|73|mm|2|abbr=on}}<br>{{convert|76|mm|2|abbr=on}}<br>{{convert|78|mm|2|abbr=on}}<br>{{convert|80|mm|2|abbr=on}}<br>{{convert|84|mm|2|abbr=on}} |stroke={{convert|71.5|mm|abbr=on}}<br>{{convert|90|mm|2|abbr=on}} | successor = [[Fiat Twin Cam engine|Fiat Twin-cam]] | block = Cast iron | head = Aluminium |turbocharger=In some versions }} Designed by [[Aurelio Lampredi]], the '''Fiat 124''' engine first appeared in the all-new [[Fiat 124]] in April 1966. The in-line four-cylinder engine comprised an iron [[cylinder block|block]] with an aluminium [[cylinder head|cylinder-head]] with [[pushrod]] actuated valves. In 1974, with the introduction of the [[Fiat 131]], a toothed belt replaced the chain to drive the camshaft.<ref>{{cite book | title = All the Fiats | year = 1996 | publisher = Editoriale Domus | location = Rozzano | page = 562 }}</ref> While originally of an [[overhead valve]] design, an [[overhead cam]] version was added to the facelifted 131 in 1981. The capacity was initially {{convert|1197|cc|L|1|abbr=on|disp=flip}} (in the Fiat 124), but eventually ranged between {{convert|1197 and 1929|cc|L|1|abbr=on|disp=flip}}. There were also three SOHC diesel iterations of 1.4, 1.7, and 1.9 litres. European production of the petrol versions ended with the Fiat 131 in 1984, but later diesel derivatives continued to be built until 1999. It did have a longer life in its [[Fiat Twin Cam engine|twin-cam iteration]], which continued in production until 2000. The {{convert|1929|cc|L|1|abbr=on|adj=on|disp=flip}} direct-injected diesel version was the first [[Fuel injection#Direct injection systems|direct-injection]] diesel to appear in a production passenger car, the [[Fiat Croma#First generation|Fiat Croma]] Turbo D i.d.
==Engine specifications== The Fiat 124 series engine was produced in a number of configurations differing in stroke and bore but maintaining a standard bore-spacing. The first model (124 A.000) was near square, using a bore and a stroke of {{convert|73x71.5|mm|abbr=on}} to produce a displacement of {{convert|1197|cc|L|1|abbr=on|disp=flip}}. A larger {{convert|1438|cc|L|1|abbr=on|disp=flip}} version arrived in October 1968, in the 124 Special. This has an {{convert|80|mm|2|abbr=on}} bore.<ref name="AR71">{{citation | ref = AR71 | title = Automobil Revue '71 | editor1-last = Braunschweig | editor1-first = Robert | display-editors = et al | language = de, fr | publisher = Hallwag SA | page = 290 | location = Berne, Switzerland | volume = 66 | date = 11 March 1971 }}</ref> The bore was increased to {{convert|76|mm|2|abbr=on}} to give a displacement of {{convert|1297|cc|L|1|abbr=on|disp=flip}} for the 131, which was also available in a 1.6-litre version with a {{convert|84|mm|2|abbr=on}} bore. A variety of other bores and strokes were available. Several of the Brazilian [[Fiat Fiasa engine|Fiasa engines]] share their bore and stroke with the 124 series engines and were sometimes used in the same cars, but the engines are not related.
The 1.3 was later bored out by 0.1 mm, to nudge the displacement above 1.3 liters. This allowed Italian motorists to drive a full {{convert|140|km/h|mph|0|abbr=on}} on the [[Autostrade of Italy|autostrada]], rather than the {{convert|130|km/h|mph|0|abbr=on}} which was allowed for cars under 1.3 litres.
The 124-series engine has five main bearings, a cast iron block and a [[Reverse-flow cylinder head|reverse-flow]] aluminum alloy head. Intake and exhaust are both located on the right-hand side of the engine.
There are also overhead camshaft versions of the 124-series engine. The first was the [[Fiat Twin Cam engine|Fiat Twin Cam]], which used the 124-series block with some modifications to use a [[DOHC]] valvetrain with a crossflow head. The Italian single overhead cam version arrived in 1981 and formed the basis for the three diesel versions.
The {{convert|1367|cc|L|1|abbr=on|disp=flip}} diesel was available in [[Turbocharger|turbocharged]] guise in the [[Fiat Uno|Uno Turbo D]], while the larger 1.9-litre version was also available with direct injection.
There was also a two-litre pushrod version (6132 AZ 2000) for the 1974 to 1982 [[Fiat Campagnola#1107|Fiat Nuova Campagnola]]; this has the {{convert|84|mm|2|abbr=on}} bore of the 1.6 but combined with a {{convert|90|mm|2|abbr=on}} stroke.<ref name="AR82">{{cite book | ref = AR82 | title = Automobil Revue '82 | editor-last = Büschi | editor-first = Hans-Ulrich | publisher = Hallwag, AG | language = German, French | page = 572 | location = Berne, Switzerland | volume = 77 | date = March 3, 1982 | isbn = 3-444-06062-9 }}</ref>
{| class="wikitable" style="text-align:center" |+ '''Valid engine bore/stroke combinations''' ! rowspan="2" width="50px" | Stroke<br />(mm) ! colspan="7" | Bore (mm) |- ! 73 !! 76 !! 76.1 !! 78 !! 80 !! 82.6 !! 84 |- ! 71.5 | style="background:#EDA584; color:black" width="50px" | 1197<br>OHV | style="background:#EDA584; color:black" width="50px" | 1297<br>OHV | style="background:#EDA584; color:black" width="50px" | 1301<br>OHV | style="background:#EDA584; color:black" width="50px" | 1367<br>SOHC,<br>diesel | style="background:#EDA584; color:black" width="50px" | 1438<br>OHV | style="color:silver" width="50px" | ''1533'' | style="background:#EDA584; color:black" width="50px" | 1585<br>OHV,<br>SOHC |- ! 79.2 | style="color:silver" width="50px" | ''1326'' | style="color:silver" width="50px" | ''1437'' | style="color:silver" width="50px" | ''1441'' | style="color:silver" width="50px" | ''1514'' | style="color:silver" width="50px" | ''1592'' | style="background:#EDA584; color:black" width="50px" | 1697<br>diesel | style="color:silver" width="50px" | ''1756'' |- ! 90 | style="color:silver" width="50px" | 1507 | style="color:silver" width="50px" | 1633 | style="color:silver" width="50px" | 1637 | style="color:silver" width="50px" | 1720 | style="color:silver" width="50px" | 1810 | style="background:#EDA584; color:black" width="50px" | 1929<br>diesel | style="background:#EDA584; color:black" width="50px" | 1995<br>OHV |}
==Applications== List of vehicles using variations of the Fiat 124-series engine (incomplete).
===Fiat=== ;OHV * [[Fiat 124]]: 1966-1974 * [[Fiat 131]] Mirafiori: 1974-1981 (longer for the Weekend/Estate) * [[Fiat 238]]: 1968-1983 (CR 7.7 Normale, CR 9.2 Super) * [[Fiat 241]]: 1965-1974 * [[Fiat 242]]: 1974-1987 * [[Fiat Campagnola]]: 1974-1987 * [[Lombardi Grand Prix#Scorpione|Abarth 1300 Scorpione]]: 1969-1971<ref name=AMS70.1>{{cite journal | url = http://home.planet.nl/~fredr079/alg/alg001de.html | ref = Schruf | last = Schruf | first = Werner | title = Scharfe Zwillinge | language = German |trans-title=Sharp twins | journal = Auto, Motor und Sport | number = 22 | date = 1970 | page = 117 }}</ref>
;SOHC * [[Fiat 131]] Mirafiori: 1981-1984 * [[Fiat Croma]]: 1985-1991
;Diesel engine * [[Fiat Uno]]: 1986-1995 (Europe) * [[Fiat Ritmo]]: 1985-1988 * [[Fiat Regata]]: 1984-1990 * [[Fiat Fiorino]]: 1988-1999 * [[Fiat Duna]]: 1987-1991 * [[Fiat Ducato]]: 1987-1999 * [[Fiat Croma]]: 1988-1997 * [[Fiat Tipo (Type 160)|Fiat Tipo]]: 1988-1995 * [[Fiat Tempra]]: 1990-1997 * [[Fiat Bravo/Brava]]: 1995-1997 * [[Lancia Delta]]: 1986-1991 * [[Lancia Prisma]]: 1984-1989 * [[Lancia Dedra]]: 1989-1999
===SEAT=== ;OHV * [[SEAT 124]]: 1968–1980 * [[SEAT 1430]]: 1969–1975 * [[SEAT 131]] L / Mirafiori L / Supermirafiori CL: 1975-1984 * [[SEAT Sport]] 1200/1430: 1975-1979 * [[SEAT 128]]: 1976–1980 * [[SEAT Ritmo]]: 1980–1983 * [[SEAT Fura]] Crono: 1981-1983 * [[SEAT Ronda]]: 1982–1984
==Footnotes== {{Reflist}}
[[Category:Fiat engines|SOHC]] [[Category:Straight-four engines]] [[Category:Gasoline engines by model]]