Alfa Romeo 120ci Specs: 84 x 88.5 mm

Alfa Romeo 120ci specs: 84 x 88.5 mm (3.3071 x 3.4843 in) bore and stroke, shared by all 3 versions. Displacement, compression and factory ratings.

At a glance

Displacement	120 ci
Cylinders	4
Bore	3.307"
Stroke	3.484"
Compression	9.0:1
Years	1971–1994

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
115.41	120 ci	3.3071" × 3.4843"	9:1	—
Bosch L-Jetronic 2.0	120 ci	3.3071" × 3.4843"	—	—
Bosch Motronic 2.0	120 ci	3.3071" × 3.4843"	—	—

Factory cars with a Alfa Romeo 120ci

• Alfa Romeo Spider: 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994

What varies across the family

All are undersquare — stroke larger than bore, favouring torque low in the range.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

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