Honda D15A

Honda D15A enginesThe Honda D15A is a 1.5 l (1,488 cc, 90.8 cu-in) straight-4, four-stroke cycle gasoline engine from Honda D -family. The engine was manufactured since 1984 to 1987.

A 74 mm (2.91 in) cylinder bore and 86.5 mm (3.41 in) piston stroke give the motor a total of 1,488 cc of displacement.

The Honda D15A motor versions:
D15A1 – this is the first engine of the D-series. The engine is equipped with a PGM carburetor, single overhead camshaft with 3 valves per cylinder (12 in total). The D15A1 has compression ratio rating of 9.2:1 and used on Honda CRX from 1984 to 1987. The engine produced 77 PS (57 kW; 76 HP) at 5,500 rpm of horsepower and 114 Nm (11.6 kg·m; 84 ft·lb) at 3,500 rpm. Redline is 6,500 rpm

D15A2 – it is (SOHC, single overhead camshaft) engine with 2 valves per cylinder (8 in total) and electronic fuel injection system. Compression ratio rating could be 10.0:1. The engine produced 61 PS (45 kW; 60 HP) at 5,500 rpm of output power and 99 Nm (10 kg·m; 73 ft·lb) at 3,500 rpm or torque. Redline is 6,000 rpm.

D15A2 – this is an upgraded version of the engine with 12 valves and electronic fuel injection system. Compression ratio rating could be 8.7:1. The engine produced from 92 PS (68 kW; 91 HP) at 5,500 rpm to 100 PS (74 kW; 99 HP) at 5,750 rpm (for Europe) of output power and 126 Nm (12.9 kg·m; 93 ft·lb) at 4,500 rpm or torque. This engine was stamped with EW3 or EW4 in 1985-1986 years before switching to D15A3 stamp in 1987.

The breakdown of the engine code is as follows:

  • D – Engine Family
  • 15 – 1.5 Liter Displacement
  • A1, A2, A3 – Engine version

General information

Engine Specifications
Engine codeD15A1 / D15A2 / D15A3
LayoutFour stroke, Inline-4 (Straight-4)
Fuel typeGasoline
Displacement1.5 L, 1,488 cm3 ( 90.8 cu in)
Fuel system D15A1 – Carburetor
D15A2, D15A3 – Electronic fuel injection system
Power adderNone
Max. horsepower D15A1
77 PS (57 KW; 76 HP) at 5,500 rpm
61 PS (45 KW; 60 HP) at 5,500 rpm
92 PS (68 KW; 91 HP) at 5,500 rpm
100 PS (74 KW; 99 HP) at 5,750 rpm
Max. torque D15A1
114 Nm (11.6 kg·m; 84.0 ft·lb) at 3,500 rpm
99 Nm (10.0 kg·m; 73.0 ft·lb) at 3,500 rpm
126 Nm (12.9 kg·m; 93.0 ft·lb) at 4,500 rpm
Firing order1-3-4-2
Dimensions (L x H x W):

Cylinder block

The D15A engine has an aluminium cylinder block with cast-iron cylinder liners. A cylinder bore is 74.0 mm (2.91 in) and piston stroke is 86.5 mm (3.41 in).

Cylinder block
Cylinder block alloyCast iron
Compression ratio: D15A1: 9.2:1
D15A2: 10.0:1
D15A3: 8.7:1
Cylinder bore:74.0 mm (2.91 in)
Piston stroke:86.5 mm (3.41 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:5

Cylinder head

The cylinder head is made of aluminum alloy. The engines have 8 or 12 valves and single overhead camshaft witch driven from the crankshaft by a timing belt.

Cylinder head
Valve Arrangement:SOHC, betl drive
Valves: D15A1, D15D3: 12 (3 valves per cylinder)
D15A2: 8 (2 valves per cylinder)

Maintenance data

Valve clearance
Intake valve0.20 mm (0.008 in)
Exhaust valve0.25 mm (0.010 in)
Oil system
Oil consumption , L/1000 km (qt. per miles)up to 0.5 (1 qt. per 1200 miles)
Recommended engine oil10W-30
Engine oil capacity (Refill capacity) With oil filter: 3.4 l
Without oil filter: 3.3 l
Oil change interval, km (miles)10,000 (6,000)

Vehicle applications

ModelYears Produced
Honda CRX1984–1987
Honda CRX HF Grifin1984–1987
Honda CRX Si (Aurtralia and New Zealand)1985–1987
1987 Civic Si (Aurtralia and New Zealand)1987
Honda Civic 1.5i (Europe)1985–1987
Honda CRX 1.5i (Europe)1984–1987
Honda Civic Si Hatch (US)1986–1987
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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