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Toyota 2S-E specs: 2.0L (122 ci) 4-cylinder, 84 x 90 mm (3.3071 x 3.5433 in) bore and stroke, 8.7:1 compression. Rated 97 hp, 1986. Used in the Toyota Celica.
The Toyota 2S-E is undersquare — the 3.5433" stroke exceeds the 3.3071" bore by 6.7% — a layout that trades peak RPM for leverage and torque low in the range. The 3.5433" stroke puts mean piston speed at 4,000 ft/min around 6,750 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 30.5 ci (500 cc).
8.7:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 6 engines in the Toyota 122ci family, all of them 122 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 122 ci / 2 L |
|---|---|
| Bore | 3.3071" |
| Stroke | 3.5433" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 8.7:1 * |
| Bore/stroke ratio | 0.933 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Advertised HP | 97 hp |
| Years | 1986 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 1986 | 2S-E net | 97 @ 4400 | 118 lb-ft @ 4000 | — |
Factory specification sheet.
| Bore/stroke character | 0.933 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,543 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 30.5 ci |
| Static compression | 8.7:1 — low by modern standards, generally happy on regular pump fuel |
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1 factory vehicle, 1986. Each year opens that model's engine table.