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Volvo B5254T2 specs: 154 ci 5-cylinder, 83 x 93.2 mm (3.2677 x 3.6693 in) bore and stroke, 9:1 compression. Built 2003–2004. Used in the Volvo V70.
The Volvo B5254T2 is undersquare — the 3.6693" stroke exceeds the 3.2677" bore by 10.9% — a layout that trades peak RPM for leverage and torque low in the range. The 3.6693" stroke puts mean piston speed at 4,000 ft/min around 6,550 RPM, which is where a production bottom end is generally considered at its limit. Each of the 5 cylinders displaces 30.8 ci (505 cc).
9:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 2 engines in the Volvo 154ci family, all of them 154 ci — the differences between them are in compression, heads and rating, not displacement. 2 factory variants share these dimensions across 2003–2004.
| Displacement | 154 ci |
|---|---|
| Bore | 3.2677" |
| Stroke | 3.6693" |
| Cylinders | 5 |
| Compression ratio | 9:1 |
| Bore/stroke ratio | 0.891 |
| Fuel type | gas |
|---|---|
| Years | 2003–2004 |
| Bore/stroke character | 0.891 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,669 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 30.8 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.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 2003 | — | B5254T2 |
| 2004 | — | B5254T2 |
1 factory vehicle, 2003–2004. Each year opens that model's engine table.