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Volvo B5234T specs: 142 ci 5-cylinder, 81 x 90 mm (3.1890 x 3.5433 in) bore and stroke, 8.5:1 compression. Built 1994–1997. Used in the Volvo 850.
The Volvo B5234T is undersquare — the 3.5433" stroke exceeds the 3.189" bore by 10.0% — 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 5 cylinders displaces 28.4 ci (465 cc).
8.5:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 7 engines in the Volvo 142ci family, all of them 142 ci — the differences between them are in compression, heads and rating, not displacement. 4 factory variants share these dimensions across 1994–1997.
| Displacement | 142 ci |
|---|---|
| Bore | 3.189" |
| Stroke | 3.5433" |
| Cylinders | 5 |
| Compression ratio | 8.5:1 |
| Bore/stroke ratio | 0.9 |
| Fuel type | gas |
|---|---|
| Years | 1994–1997 |
| Bore/stroke character | 0.900 — 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 | 28.4 ci |
| Static compression | 8.5:1 — 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 |
|---|---|---|
| 1994 | — | B5234T |
| 1995 | — | B5234T |
| 1996 | — | B5234T |
| 1997 | — | B5234T |
2 factory vehicles, 1994–2004. Each year opens that model's engine table.