Honda A engine

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Honda B engine
Manufacturer Honda
Production 1982–1989
Combustion chamber
Configuration SOHC inline four
Predecessor Honda E engine
Successor Honda F engine

The Honda A engine was a series of inline-four cylinder engines introduced in 1982 with the second-generation Honda Prelude. The A series featured a single overhead camshaft, iron blocks with aluminum heads and three valves per cylinder for a total of 12 valves. It was available in carbureted and fuel-injected configurations.


The Honda A-series engines succeeded the earlier EZ, ES, BS and ET engines in the Honda Accord and Prelude. There were several variations, ranging from the 1.6 liter A16A to the 2.0 liter A20A.

Beginning in the 1988 model year in the North American market, the A20A3 and A20A4 used a dual-stage runner intake manifold design, 4-2-1 exhaust manifold, and a more advanced electronic distributor. The Programmed fuel injection engines were equipped with partial OBD-0 engine computers.


The aftermarket has produced various parts for the Accord and Prelude A series engine. Most upgrades and modifications to the A-series engines are of the do-it-yourself variety, with one of the more popular being a turbo setup.

A-Series engines[edit]

A Series was a Watercoolled gasoline fulled, 4-cycle OHC. 4 Cylinder in-Line transverse. valve train : Trochoid pump. Regular gasoline with 91 RON or higher


The A16A1 was a carburated 1.6 liter engine used in 1986-1989 Accords and Vigors outside the North American market. This engine was known as the EZ in 1984 and 1985, non-US Accords.


  • Carbureted
  • Displacement: 1,598 cc (97.5 cu in)
  • Bore: 80 mm (3.1 in)
  • Stroke: 79.5 mm (3.13 in)
  • Compression Ratio : 1:9
  • Power:
    • 88 hp (66 kW) @ 6000 rpm
    • 91 lb·ft (123 N·m) torque @ 3500 rpm


The A18A engine was the 1.8 liter engine found in 1984-1987 Honda Prelude in the US. Outside North America, it was also available in the 1986-1989 Accords. It was known as the ET1 in the 1984 and 1985 non-US Accords.


  • Carbureted
  • Displacement: 1,829 cc (111.6 cu in)
  • Bore: 80 mm (3.1 in)
  • Stroke: 91 mm (3.6 in)
  • Power:
    • 110 hp (82 kW) @ 5800 rpm
    • 112 lb·ft (152 N·m) @ 3500 rpm


The A20A was available in both carbureted and fuel-injected versions. It has a SOHC 12-valve NON-CVCC cylinder head, with two intake valves and one exhaust valve per cylinder. They were found in both Accords and Preludes during the 1980s.

A20A1 & A20A2[edit]

The A20A1 and A20A2 were the carbureted versions of the A20A engines. It was available in the 1984-1987 Honda Preludes as well as the 1982-1989 Accord DX and LX. They are the same engine, the only difference between them being that the A20A2 has no emissions components, so it has a slightly higher power output.


  • Exhaust: 4-1 Cast Manifold
  • Induction: Carbureted 2bbl Keihin ( Feedback Carb )
  • Displacement: 1,955 cc (119.3 cu in)
  • Bore: 82.7 mm (3.26 in)
  • Stroke: 91 mm (3.6 in)
  • Compression Ratio : 1:9.2; 1:9.1 (Accord KX model)
  • Power (A20A1):
    • 98 hp (73 kW)
    • 109 lb·ft (148 N·m) at 3500 rpm

A20A3 and A20A4[edit]

The A20A3 and A20A4 were the fuel injected versions of the A20A engines. They were run by Honda's PGM-FI system on a partial OBD-0 computer. The A20A4 gives a slightly higher power output because of not having emissions components. The A20A3 was offered in the 1984-1987 Honda Prelude 2.0Si, the 1989 Honda Accord SE-i, and the 1986-1989 Honda Accord LX-i.


  • PGM-FI
  • Displacement: 1,955 cc (119.3 cu in)
  • Bore:82.7 mm (3.26 in)
  • Stroke:91 mm (3.6 in)
  • Compression Ratio : 1:9.4; 1:8.9 (Accord KS Model); 1:8.8(Accord KX & KG with Cata);
  • Power:
    • 1984-1987: 98 hp (73 kW) @ 5500 rpm & 102 lb·ft (138 N·m) @ 4500 rpm (12 valve)
    • 1988-1989: 120 hp (89 kW) @ 5500 rpm & 122 lb·ft (165 N·m) @ 4000 rpm (12 valve)

See also[edit]