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Toyota 4A-C / 4A-LC specs: 1.6L (96.9 ci) 4-cylinder, 81 x 77 mm (3.1890 x 3.0315 in) bore and stroke, 9:1 compression. Built 1984–1987.
The Toyota 4A-C / 4A-LC is oversquare — the 3.189" bore exceeds the 3.0315" stroke by 5.2% — a layout that favors airflow and RPM over leverage at the crank. The 3.0315" stroke does not reach 4,000 ft/min of mean piston speed until about 7,900 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 4 cylinders displaces 24.2 ci (397 cc).
9:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 10 engines in the A-series family, the smallest at 96.9 ci. 4 factory variants share these dimensions across 1984–1987.
| Displacement | 96.9 ci / 1.6 L |
|---|---|
| Bore | 3.189" |
| Stroke | 3.0315" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 9:1 * |
| Bore/stroke ratio | 1.052 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Years | 1984–1987 |
| Bore/stroke character | 1.052 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,032 ft/min — conservative for a street engine |
| Displacement per cylinder | 24.2 ci |
| Static compression | 9:1 — low by modern standards, generally happy on regular pump fuel |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1984 | — | 4A-C / 4A-LC |
| 1985 | — | 4A-C / 4A-LC |
| 1986 | — | 4A-C / 4A-LC |
| 1987 | — | 4A-C / 4A-LC |
1 factory vehicle, 1983–1988. Each year opens that model's engine table.