Nissan 73ci Engine Specs

Bore, stroke, displacement and compression for all 2 Nissan 73ci engines, compared side by side. Plus rod ratio and head specs where published.

At a glance

Displacement	73 ci
Cylinders	4
Bore	2.874–2.953"
Stroke	2.756–2.795"
Advertised power	60 hp
Years	1962–1982

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
A12A	73 ci	2.9528" × 2.7559"	—	—
E-1	73 ci	2.874" × 2.7953"	—	60

Factory cars with a Nissan 73ci

• Nissan Datsun / Nissan Pickup: 1962, 60 hp; 1963, 60 hp; 1964, 60 hp; 1965, 60 hp
• Datsun 210: 1979, A12A; 1980, A12A; 1981, A12A; 1982, A12A

What varies across the family

Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.

1 of 2 are oversquare — bore larger than stroke, which favours revs over low-end torque.

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.

← All Nissan engines