Designed by ex Ferrari engineer Aurelio Lampredi, the Fiat Twin Cam (also known as the Lampredi Twin Cam) was an advanced inline-four automobile engine produced from 1966 through 2000 as a Fiat/Lancia engine until it was replaced by the "family B" Pratola Serra engine series. The engine was produced in a large number of displacements, ranging from 1.3 to 2.0 L (1,297 to 1,995 cc) and was used in Fiat, Lancia, Alfa Romeo, SEAT and Morgan cars. The Fiat Twin Cam engine has been widely used in motorsport and has been the most successful engine in the history of the World Rally Championship. Fiat and Lancia won a total of ten World Rally Championships for Manufacturers using engines based on the Lampredi Twin Cam engine.
The engine uses the block of the OHV 124-series unit first found in the Fiat 124 with some modifications to accept the belt drive for the camshafts. The head itself is made in three pieces, one carrying the combustion chamber and valves and one separate casting for each camshaft in tunnel type bearings. The valves had an included angle of 65 degrees. The engine featured a revolutionary new method for adjusting the valve clearance. Usually at that time in DOHC engines like from Alfa Romeo or Jaguar, small shims were placed on the valve stem inside the bucket tappets, thereby necessitating the removal of the camshafts to get access to these shims to adjust the valve clearance, making for time consuming and very expensive maintenance work. Lampredi’s design placed the shims on top of the tappets where they could be removed with the camshaft in situ after the tappets were pressed down with a special tool. This design was patented for Fiat and was used in the engines of the 128 and 130, and even the Ferrari/Fiat Dino V6 engine was converted to this system.
Fiat was a pioneer in engine development during the time period, using belt driven camshafts and aluminium alloy heads. Earlier Fiat Twin Cam engines were actually O.S.C.A. designs.
Applications
Lampredi's twin cam engine was first seen in the Fiat 124 coupé of late 1966, but was later made available in a large number of cars.
One version was the CHT (for "Controlled High Turbulence"). This version was mainly used in the first generation Fiat Croma and used a special head and intake with auxiliary intake ducts to provide a better fuel and gas mixture under low or partial acceleration.[1] This meant considerably improved fuel mileage.
Fiat 131 Supermirafiori/132/Argenta/Ritmo 105TC; Lancia Beta/Delta GT/Delta HF/Prisma
1.6 L (1,592 cc)
80 mm × 79.2 mm (3.15 in × 3.12 in)
Fiat 124 Special T/coupe/Spider, Fiat 132; Lancia Beta, Polski Fiat 125p Monte Carlo
1.6 L (1,608 cc)
80 mm × 80 mm (3.15 in × 3.15 in)
Fiat 124 coupe/Spider, Fiat 125
1.8 L (1,756 cc)
84 mm × 79.2 mm (3.31 in × 3.12 in)
Fiat 124 coupe/Spider, Fiat 132/Tipo/Tempra; Lancia Beta/Delta/Prisma/Dedra, Polski Fiat 125p Akropolis
2.0 L (1,995 cc)
84 mm × 90 mm (3.31 in × 3.54 in)
Fiat Spider 2000/131/132/Argenta/Strada/Ritmo/Regata/Croma/Tipo/Tempra/coupé; Lancia Beta/Delta/Prisma/Dedra/Thema, FSO Polonez
2.1 L (2,110 cc)
85 mm × 93 mm (3.35 in × 3.66 in)
Lancia 037 Evo II (also supercharged)
Engine Codes
Engine type
Engine volume
Engine power
124AC3.000
1438ccm
90HP
124AC.000
1438ccm
90HP
124AC.040
1438ccm
96HP
132A.040.4
1592ccm
95HP
132AC.000
1592ccm
95HP
132A9.000
1592ccm
98HP
132AC.040.3
1592ccm
87HP
125BC000
1608ccm
110HP
125BC040
1608ccm
110HP
132AC1.000
1756ccm
114HP/118HP
132A1.031.5
1756ccm
83HP
132A1.040.4
1756ccm
86HP
132A1.040.5
1756ccm
86HP
131A1.040
1756ccm
87HP
132AC4.000
1756ccm
128HP
132C2.040
1995ccm
83HP
132C2.031
1995ccm
87HP
132C3.031
1995ccm
102HP/105HP
132V3.031
1995ccm
135HP
125A.000
1608ccm
90HP
125B.000
1608ccm
100HP
131B.000
1297ccm
77HP
131B7.000
1301ccm
77HP
131C1.000
1367ccm
77HP
131B1.000
1585ccm
95HP/98HP
131C3.000
1585ccm
97HP
132A1.040
1756ccm
87HP
132C2.031
1995ccm
80HP
132C2.040
1995ccm
86HP
132C3.031
1995ccm
102HP
132C3.040
1995ccm
80HP/105HP
131B2.000
1995ccm
115HP
131C4.000
1995ccm
115HP
132DB.000
1995ccm
187HP
131AR.000
1995ccm
140HP/215HP
132A.000
1592ccm
98HP
132B.000
1592ccm
98HP
132C.600
1585ccm
90HP
132C.000
1585ccm
98HP
132A1.000
1756ccm
105HP
132B1.000
1756ccm
107HP/111HP
132CB.0A0
1585ccm
98HP
132C2.000
1995ccm
112HP
132D.000
1585ccm
98HP
132D1.000
1995ccm
113HP
132D4.000
1995ccm
122HP
132C3.000
1995ccm
122HP
132D7.000
1995ccm
135HP
132E.000
1995ccm
135HP
828B3.000
1297ccm
82HP
828C3.000
1301ccm
84HP
828D3.000
1367ccm
83HP
828A2.000
1438ccm
90HP
828A.000
1592ccm
100HP
828AC.000
1592ccm
108HP
828B.000
1585ccm
100HP (>82)
828B.000
1585ccm
108HP (82>)
828A1.000
1756ccm
110HP
828A1.0405
1756ccm
86HP
828AC1.000
1756ccm
120HP
134AS.600
1756ccm
82HP
134AS.0316
1756ccm
82HP
828B1.000
1995ccm
115HP (->78)
828B1.000
1995ccm
119HP (79->)
828B1.0405
1995ccm
87HP
134AS.000
1995ccm
120HP
828B4.000
1995ccm
122HP
828B4.0405
1995ccm
108HP/106HP
828B7.000
1995ccm
135HP
838A4.000
1995ccm
205HP (Kappa)
?
1995ccm
205HP (037 stradale)
?
2110ccm
325HP (competition engine)
Motorsport
The Fiat Twin Cam engine has been widely used in motorsport and has been the most successful engine in the history of the World Rally Championship. The World Rally Championship for Manufacturers has been won by Fiat and Lancia, using engines based on the Lampredi Twin Cam engine, for a total of 10 years.
The four valve version made its first appearance in the Group 4 competition version of the Fiat 124 Spider Abarth, where it had 1.8 litres. Group 4 regulations at that time allowed the use of a cylinder head of a "free" design. This engine still used a three-piece cylinder head design with an included valve angle of 46 degrees.
In later years motorsport regulations were changed so that the use of four valve heads was only possible when the homologated cars had four valve heads. Therefore, the homologation series of the Fiat 131 Rally Abarth came with a two-litre version of the four valve engine.
These engines were later used in the mid-engined Lancia 037, where they were supercharged and eventually enlarged to 2.1 litres.
Wikimedia Commons has media related to Fiat Twin Cam engine.
^. Dizionario Tecnico dell'Automobilismo [Technical Automotive Dictionary] (in Italian). Archived from the original on 2013-06-10. Retrieved 2013-05-01.
^Büschi, Hans-Ulrich, ed. (March 3, 1982). Automobil Revue '82 (in German and French). Vol. 77. Berne, Switzerland: Hallwag, AG. p. 296. ISBN3-444-06062-9.
January 07, 2023
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This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Fiat Twin Cam engine news newspapers books scholar JSTOR February 2010 Learn how and when to remove this template message Designed by ex Ferrari engineer Aurelio Lampredi the Fiat Twin Cam also known as the Lampredi Twin Cam was an advanced inline four automobile engine produced from 1966 through 2000 as a Fiat Lancia engine until it was replaced by the family B Pratola Serra engine series The engine was produced in a large number of displacements ranging from 1 3 to 2 0 L 1 297 to 1 995 cc and was used in Fiat Lancia Alfa Romeo SEAT and Morgan cars The Fiat Twin Cam engine has been widely used in motorsport and has been the most successful engine in the history of the World Rally Championship Fiat and Lancia won a total of ten World Rally Championships for Manufacturers using engines based on the Lampredi Twin Cam engine Fiat Twin Cam engineOverviewManufacturerFiat LanciaProduction1966 2000LayoutConfigurationInline 4Displacement1 3 2 0 L 1 297 1 995 cc Cylinder bore76 mm 2 99 in 76 1 mm 3 00 in 78 mm 3 07 in 80 mm 3 15 in 82 6 mm 3 25 in 84 mm 3 31 in Piston stroke71 5 mm 2 81 in 79 2 mm 3 12 in 80 mm 3 15 in 90 mm 3 54 in Block materialCast ironHead materialAluminium alloyValvetrainDOHC 2 or 4 valves x cyl CombustionSuperchargerIn VX versionsTurbochargerIn some versionsFuel systemIndirect injection Direct injectionFuel typeGasolineCooling systemWater cooledChronologySuccessor family B Pratola Serra Contents 1 Design 2 Applications 2 1 Fiat 2 2 Lancia 2 3 Morgan 2 4 Alfa Romeo 2 5 FSO 3 Displacements 4 Engine Codes 5 Motorsport 6 See also 7 FootnotesDesign EditThe engine uses the block of the OHV 124 series unit first found in the Fiat 124 with some modifications to accept the belt drive for the camshafts The head itself is made in three pieces one carrying the combustion chamber and valves and one separate casting for each camshaft in tunnel type bearings The valves had an included angle of 65 degrees The engine featured a revolutionary new method for adjusting the valve clearance Usually at that time in DOHC engines like from Alfa Romeo or Jaguar small shims were placed on the valve stem inside the bucket tappets thereby necessitating the removal of the camshafts to get access to these shims to adjust the valve clearance making for time consuming and very expensive maintenance work Lampredi s design placed the shims on top of the tappets where they could be removed with the camshaft in situ after the tappets were pressed down with a special tool This design was patented for Fiat and was used in the engines of the 128 and 130 and even the Ferrari Fiat Dino V6 engine was converted to this system Fiat was a pioneer in engine development during the time period using belt driven camshafts and aluminium alloy heads Earlier Fiat Twin Cam engines were actually O S C A designs Applications EditLampredi s twin cam engine was first seen in the Fiat 124 coupe of late 1966 but was later made available in a large number of cars Fiat Edit 1966 1974 124 Sport coupe 1966 1985 124 Sport Spider 1970 1974 124 Special T 1972 1976 124 Abarth Rally 1967 1972 125 1972 1981 132 1981 1985 Argenta 1977 1983 131 1977 1980 131 Abarth 1982 1988 Ritmo 1984 1989 Ritmo 105TC 125TC 130TC 1983 1990 Regata 1985 1996 Croma 1988 1995 Tipo 1990 1999 Tempra 1994 1997 Coupe Lancia Edit 1972 1984 Beta 1973 1984 Beta Coupe HPE Spider 1975 1982 Beta Montecarlo 1976 1977 Beta Scorpion 1982 1983 Rally 037 1980 1984 Trevi 1983 1993 Delta 1988 1993 Delta Integrale 1982 1989 Prisma 1984 1994 Thema 1989 1997 Dedra 1993 1999 Delta mk2 1994 1998 Kappa 1997 1998 Kappa Coupe Morgan Edit 1982 1986 Morgan Plus 4 Alfa Romeo Edit 1988 1991 Alfa Romeo 164 2 0 Turbo 8V 1992 1997 Alfa Romeo 155 Q4 FSO Edit 1973 1975 Polski Fiat 125p Monte Carlo 1973 1977 Polski Fiat 125p Akropolis 1978 1989 FSO Polonez Fiat CHT engine in a Croma One version was the CHT for Controlled High Turbulence This version was mainly used in the first generation Fiat Croma and used a special head and intake with auxiliary intake ducts to provide a better fuel and gas mixture under low or partial acceleration 1 This meant considerably improved fuel mileage Displacements EditDisplacement Bore x Stroke Models1 3 L 1 297 cc 76 mm 71 5 mm 2 99 in 2 81 in Lancia Beta Fiat 131 Supermirafiori citation needed 1 3 L 1 301 cc 76 1 mm 71 5 mm 3 00 in 2 81 in Lancia Beta citation needed 1 4 L 1 367 cc 78 mm 71 5 mm 3 07 in 2 81 in Fiat 131 Supermirafiori 2 1 4 L 1 438 cc 80 mm 71 5 mm 3 15 in 2 81 in Lancia Beta Fiat 124 Special T coupe Spider1 6 L 1 585 cc 84 mm 71 5 mm 3 31 in 2 81 in Fiat 131 Supermirafiori 132 Argenta Ritmo 105TC Lancia Beta Delta GT Delta HF Prisma1 6 L 1 592 cc 80 mm 79 2 mm 3 15 in 3 12 in Fiat 124 Special T coupe Spider Fiat 132 Lancia Beta Polski Fiat 125p Monte Carlo1 6 L 1 608 cc 80 mm 80 mm 3 15 in 3 15 in Fiat 124 coupe Spider Fiat 1251 8 L 1 756 cc 84 mm 79 2 mm 3 31 in 3 12 in Fiat 124 coupe Spider Fiat 132 Tipo Tempra Lancia Beta Delta Prisma Dedra Polski Fiat 125p Akropolis2 0 L 1 995 cc 84 mm 90 mm 3 31 in 3 54 in Fiat Spider 2000 131 132 Argenta Strada Ritmo Regata Croma Tipo Tempra coupe Lancia Beta Delta Prisma Dedra Thema FSO Polonez2 1 L 2 110 cc 85 mm 93 mm 3 35 in 3 66 in Lancia 037 Evo II also supercharged Engine Codes EditEngine type Engine volume Engine power124AC3 000 1438ccm 90HP124AC 000 1438ccm 90HP124AC 040 1438ccm 96HP132A 040 4 1592ccm 95HP132AC 000 1592ccm 95HP132A9 000 1592ccm 98HP132AC 040 3 1592ccm 87HP125BC000 1608ccm 110HP125BC040 1608ccm 110HP132AC1 000 1756ccm 114HP 118HP132A1 031 5 1756ccm 83HP132A1 040 4 1756ccm 86HP132A1 040 5 1756ccm 86HP131A1 040 1756ccm 87HP132AC4 000 1756ccm 128HP132C2 040 1995ccm 83HP132C2 031 1995ccm 87HP132C3 031 1995ccm 102HP 105HP132V3 031 1995ccm 135HP125A 000 1608ccm 90HP125B 000 1608ccm 100HP131B 000 1297ccm 77HP131B7 000 1301ccm 77HP131C1 000 1367ccm 77HP131B1 000 1585ccm 95HP 98HP131C3 000 1585ccm 97HP132A1 040 1756ccm 87HP132C2 031 1995ccm 80HP132C2 040 1995ccm 86HP132C3 031 1995ccm 102HP132C3 040 1995ccm 80HP 105HP131B2 000 1995ccm 115HP131C4 000 1995ccm 115HP132DB 000 1995ccm 187HP131AR 000 1995ccm 140HP 215HP132A 000 1592ccm 98HP132B 000 1592ccm 98HP132C 600 1585ccm 90HP132C 000 1585ccm 98HP132A1 000 1756ccm 105HP132B1 000 1756ccm 107HP 111HP132CB 0A0 1585ccm 98HP132C2 000 1995ccm 112HP132D 000 1585ccm 98HP132D1 000 1995ccm 113HP132D4 000 1995ccm 122HP132C3 000 1995ccm 122HP132D7 000 1995ccm 135HP132E 000 1995ccm 135HP828B3 000 1297ccm 82HP828C3 000 1301ccm 84HP828D3 000 1367ccm 83HP828A2 000 1438ccm 90HP828A 000 1592ccm 100HP828AC 000 1592ccm 108HP828B 000 1585ccm 100HP gt 82 828B 000 1585ccm 108HP 82 gt 828A1 000 1756ccm 110HP828A1 0405 1756ccm 86HP828AC1 000 1756ccm 120HP134AS 600 1756ccm 82HP134AS 0316 1756ccm 82HP828B1 000 1995ccm 115HP gt 78 828B1 000 1995ccm 119HP 79 gt 828B1 0405 1995ccm 87HP134AS 000 1995ccm 120HP828B4 000 1995ccm 122HP828B4 0405 1995ccm 108HP 106HP828B7 000 1995ccm 135HP838A4 000 1995ccm 205HP Kappa 1995ccm 205HP 037 stradale 2110ccm 325HP competition engine Motorsport EditThe Fiat Twin Cam engine has been widely used in motorsport and has been the most successful engine in the history of the World Rally Championship The World Rally Championship for Manufacturers has been won by Fiat and Lancia using engines based on the Lampredi Twin Cam engine for a total of 10 years The four valve version made its first appearance in the Group 4 competition version of the Fiat 124 Spider Abarth where it had 1 8 litres Group 4 regulations at that time allowed the use of a cylinder head of a free design This engine still used a three piece cylinder head design with an included valve angle of 46 degrees In later years motorsport regulations were changed so that the use of four valve heads was only possible when the homologated cars had four valve heads Therefore the homologation series of the Fiat 131 Rally Abarth came with a two litre version of the four valve engine These engines were later used in the mid engined Lancia 037 where they were supercharged and eventually enlarged to 2 1 litres In addition to the titles in the World Rally Championship the Fiat Twin Cam equipped the Lancia Beta Montecarlo turbo that won the World Sportscar Championship for two consecutive seasons in 1980 1981 The Fiat Twin Cam has also been used in hot rods and kit cars with an aftermarket kit to swap one into the Morris Minor Fiat 131 Abarth of Walter Rohrl at 1980 Rallye Sanremo Constructor Car used in World Championship Seasons Manufacturers titles Fiat Fiat 124 Abarth 1970 1975 Lancia Lancia Beta coupe 1974 1975 Fiat Fiat 131 Abarth 1976 1982 3 1977 1978 1980 Lancia Lancia 037 1982 1986 1 1983 Lancia Lancia Delta HF 4WD and Delta Integrale 1987 1993 6 1987 1992 See also EditFiat Pratola Serra modular enginesFootnotes Edit Wikimedia Commons has media related to Fiat Twin Cam engine CHT Dizionario Tecnico dell Automobilismo Technical Automotive Dictionary in Italian Archived from the original on 2013 06 10 Retrieved 2013 05 01 Buschi Hans Ulrich ed March 3 1982 Automobil Revue 82 in German and French Vol 77 Berne Switzerland Hallwag AG p 296 ISBN 3 444 06062 9 Retrieved from https en wikipedia org w index php title Fiat Twin Cam engine amp oldid 1129634627, wikipedia, wiki, book, books, library,
