Fiat Twin Cam engine

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Designed by Aurelio Lampredi the Fiat Twin Cam was an advanced straight-4 automobile engine produced from 1959 through 1994 as a Fiat/Lancia engine and from 1995 onwards with a redesigned cylinder-head as an Alfa Romeo Twin Spark engine (replacing the original Alfa Romeo Twin-Cam in all front-wheel drive Alfa Romeos).[1] As the name implies, it was a DOHC design, which was quite unusual in the late 1950s. A few non-DOHC variants were also produced. The engine was produced in a large number of displacements, ranging from 1297 cc to 1995 cc and was used in Fiat, Lancia and Alfa Romeo automobiles. It was one of the first mass produced engines to use belt driven camshafts.

Contents

Displacement
(cc)		 Bore
(mm)		 Stroke
(mm)
1297 76 72 Lancia Beta
1301
1367
1438 80 72 Fiat124ST/Coupe/Spider
1491 78 78
1491 78 78
1585 84 71.5
1592 80 79.2 Fiat 124ST/Coupe Lancia Beta
1598
1608 80 80 Fiat 125
1756 84 79.2 Fiat 132 Lancia Beta
1995 84 90 Fiat 132/Argenta Lancia Beta

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.

Constructor Car used in Championship Total Seasons
Flag of Italy Fiat Fiat 131 Abarth 3 1977-1978, 1980
Flag of Italy Lancia Lancia 037 1 1983
Flag of Italy Lancia Lancia Delta HF 4WD and Delta Integrale 6 1987-1992

  1. ^ Excluding the Alfasud (and derived) cars which used an original flat-four Alfa Romeo "boxer" engine
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