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American Motors 195ci specs: 195 ci (3.2L) 6-cylinder, 3.125 x 4.25 in (79.4 x 108 mm) bore and stroke, 8.7:1 compression. Rated 125-138 hp, 1960–1965.
The American Motors 195ci is undersquare — the 4.25" stroke exceeds the 3.125" bore by 26.5% — a layout that trades peak RPM for leverage and torque low in the range. The 4.25" stroke puts mean piston speed at 4,000 ft/min around 5,650 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.559 is in the range most production engines fall in. Each of the 6 cylinders displaces 32.5 ci (533 cc).
8.7:1 is low by modern standards and generally happy on regular pump fuel.
15 factory variants share these dimensions, rated from 125 to 138 hp across 1960–1965.
| Displacement | 195 ci / 3.2 L |
|---|---|
| Bore | 3.125" |
| Stroke | 4.25" |
| Cylinders | 6 |
| Compression ratio | 8.7:1 |
| Rod length | 6.625" |
| Rod ratio | 1.559 |
| Bore/stroke ratio | 0.735 |
| Piston deck clearance | 0" |
| Induction | 1-1 |
|---|---|
| Advertised HP | 125–138 hp |
| Years | 1960–1965 |
| Bore/stroke character | 0.735 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 4,250 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.559 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 32.5 ci |
| Static compression | 8.7:1 — low by modern standards, generally happy on regular pump fuel |
| Intake valve diameter | 1.594" |
|---|---|
| Exhaust valve diameter | 1.343" |
| Chamber volume | 89 cc |
| Rocker ratio | 1.46:1 |
| Lifter type | mechanical |
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These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1960 | 127 hp | — |
| 1960 | 138 hp | — |
| 1961 | 125 hp | — |
| 1961 | 127 hp | — |
| 1961 | 138 hp | — |
| 1962 | 125 hp | — |
| 1962 | 127 hp | — |
| 1962 | 138 hp | — |
| 1963 | 125 hp | — |
| 1963 | 127 hp | — |
| 1963 | 138 hp | — |
| 1964 | 125 hp | — |
| 1964 | 127 hp | — |
| 1964 | 138 hp | — |
| 1965 | 125 hp | — |