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 1994 onwards with a redesigned cylinder-head as an Alfa Romeo engine (replacing the original Alfa Romeo Twin-Cam in all front-wheel drive Alfa Romeos). Excluding the Alfasud (and derived) cars which used an original flat-four Alfa Romeo "boxer" engine 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.

Applications:

• 1966-1985 Fiat 124 Spider/Coupe
• 1967-1972 Fiat 125
• 1972-1984 Fiat 132/Magenta
• 1972-1984 Lancia Beta Saloon/Coupe/Spider/HPE
• 1974-1984 Fiat 131/Mirafiori
• 1975-1984 Lancia Monte Carlo
• 1978-1988 Fiat Ritmo/Strada
• 1980-1994 Lancia Delta/HF/Integrale
• 1981-1984 Lancia Trevi
• 1984-1990 Fiat Regata
• 1985-1990 Fiat Weekend
• 1985-1992 Lancia Thema
• Morris Minor (A popular engine swap among hot rodders during the 1990's, until the Rover K Series took over later.)

Displacements

Displacement (cc)	Bore (mm)	Stroke (mm)
1297	76	72
1301
1367
1438	80	72
1491	78	78
1491	78	78
1585	84	71.5
1592	80	79.2
1598
1608	80	80
1756	84	79.2
1995	84	90

Footnotes