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Toyota 1A-C specs: 1.5L (89 ci) 4-cylinder, 77.5 x 77 mm (3.0512 x 3.0315 in) bore and stroke, 9:1 compression. Built 1980. Used in the Toyota Tercel.
The Toyota 1A-C is close to square: 3.0512" bore against 3.0315" stroke, within 0.6%, which splits the difference between a high-revving layout and a torque layout. 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 22.3 ci (365 cc).
9:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 4 engines in the Toyota 89ci family, all of them 89 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 89 ci / 1.5 L |
|---|---|
| Bore | 3.0512" |
| Stroke | 3.0315" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 9:1 * |
| Bore/stroke ratio | 1.006 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Years | 1980 |
| Bore/stroke character | 1.006 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,032 ft/min — conservative for a street engine |
| Displacement per cylinder | 22.3 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.
1 factory vehicle, 1980. Each year opens that model's engine table.