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Oldsmobile L61 specs: 134 ci (2.2L) 4-cylinder, 3.386 x 3.724 in (86 x 94.6 mm) bore and stroke, 10:1 compression. Rated 140 hp, 2002–2004.
The Oldsmobile 134ci (L61) is undersquare — the 3.7244" stroke exceeds the 3.3858" bore by 9.1% — a layout that trades peak RPM for leverage and torque low in the range. The 3.7244" stroke puts mean piston speed at 4,000 ft/min around 6,450 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 33.5 ci (549 cc).
10:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
3 factory variants share these dimensions, rated at 140 hp across 2002–2004.
| Displacement | 134 ci / 2.2 L |
|---|---|
| Bore | 3.3858" |
| Stroke | 3.7244" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 10:1 |
| Bore/stroke ratio | 0.909 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Redline | 6,500 rpm (factory limit) |
| Advertised HP | 140 hp |
| Years | 2002–2004 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2003 | L61 net | 140 @ 5600 | 150 lb-ft @ 4000 | 10:1 |
Factory specification sheet.
| Bore/stroke character | 0.909 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,724 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 33.5 ci |
| Static compression | 10:1 — in the range that usually runs on pump premium |
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 |
|---|---|---|
| 2002 | 140 hp | L61 |
| 2003 | 140 hp | L61 |
| 2004 | 140 hp | L61 |
6 factory vehicles, 2002–2008. Each year opens that model's engine table.