Nissan A12A

Nissan A12AThe Nissan A12A is a 1.24 l (1,237 cc, 75.5 cu-in) four-cylinder four-stroke gasoline engine from Nissan A-family. The engine was manufactured by Nissan Motor Company from 1977 to 1982.

The A12A motor uses a lightweight cast-iron block and an aluminum cylinder head, with overhead valves and a single camshaft. The engine was equipped with a two-barrel carburetor. Bore and stroke are 75.0 mm (2.95 in) and 70.0 mm (2.76 in), respectively. The A12A produced 69.0 PS (51.0 KW; 68.0 HP) at 6,000 rpm of horsepower.

The breakdown of the engine code is as follows:

  • A – Engine Family
  • 12 – 1.2 Liter Displacement
  • A

General information

Engine Specifications
Engine codeA12A
LayoutFour stroke, Inline-4 (Straight-4)
Fuel typeGasoline (petrol)
Displacement1.2 L, 1,237 cc (75.5 cu in)
Fuel systemCarburetor type
Power adderNone
Power output69.0 PS (51.0 KW; 68.0 HP) at 6,000 rpm
Torque output
Firing order1-3-4-2
Dimensions (L x W x H):

Cylinder block

The A12A has a cast-iron cylinder block utilizes a five-bearing supported system. The cylinder bore is 75.0 mm (2.95 in) and the stroke is 70.0 mm (2.76 in). The A12A engine has two compression and a single oil control ring.

Cylinder block
Cylinder block alloyCast iron
Compression ratio:
Cylinder bore:75.0 mm (2.95 in)
Piston stroke:70.0 mm (2.76 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:5
Cylinder inner diameter (standard):75.000-75.050 mm (2.9527-2.9547 in)
Piston skirt diameter (standard):74.967-75.017 mm (2.9514-2.9534 in)
Connecting rod center distance:121.5 mm (4.78 in)

Cylinder head

Cylinder head
Valve Arrangement:OHV, chain drive
Valves:8 (2 valves per cylinder)

Maintenance data

Cylinder compression
Standard13.5 kg/m2 (192 psi) / 350 rpm
Minimun12.5 kg/m2 (178 psi) / 350 rpm
Oil system
Oil consumption , L/1000 km (qt. per miles)up to 0.5 (1 qt. per 1200 miles)
Recommended engine oil 5W-30, 5W-40, 10W-30, 10W-40
Engine oil capacity (Refill capacity) With oil filter 3.3 l (3.5 qt.)
Without oil filter 2.8 l (3.0 qt.)
Oil change interval, km (miles)5,000-10,000 (3,000-6,000)
Ignition system
Ignition coilNGK: BP5ES
Spark plug gap0.8 – 0.9 mm (0.031 – 0.035 in)

Vehicle applications

ModelYears Produced
Datsun Sunny (B310)1977–1980
Datsun 210 (USA and Canada version of Sunny B310)1979–1982
Nissan Cherry (F10, F-II)1974–1979
Datsun Cherry (N10)1978–1982
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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