Tempra 1994-1997 Coupé Lancia 1972-1984 Beta 1973-1984 Beta Coupé/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 1982-1986 Morgan Plus 4 Alfa Romeo 1988-1991 Alfa Romeo 164 2.0 Turbo 8V 1992-1997 Alfa Romeo 155 Q4 FSO 1973-1975 Polski Fiat 125p Monte Carlo 1973-1977 Polski Fiat 125p Akropolis 1978-1989 FSO Polonez 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. This meant considerably improved fuel mileage. Displacements Engine Codes 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. 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. See also Fiat Pratola Serra modular engines Footnotes Twin Cam Straight-four engines Gasoline engines by model