See other engines in this family
The same engine also has a main page: Toyota A25A-FXS.
Lexus A25A-FXS specs: 2.5L (152 ci) 4-cylinder, 87.5 x 103.4 mm (3.4449 x 4.0709 in) bore and stroke, 14:1 compression. Rated 215-304 hp, 2019–2026.
The Lexus A25A-FXS is undersquare — the 4.0709" stroke exceeds the 3.4449" bore by 15.4% — a layout that trades peak RPM for leverage and torque low in the range. The 4.0709" stroke puts mean piston speed at 4,000 ft/min around 5,900 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 38.0 ci (623 cc).
14:1 is high for a production gasoline engine; running a ratio like that on pump fuel depends on chamber design and fuel delivery rather than the number alone.
It is one of 2 engines in the Lexus 152ci family, the smallest at 152 ci. 15 factory variants share these dimensions, rated from 215 to 304 hp across 2019–2026.
| Displacement | 152 ci / 2.5 L |
|---|---|
| Bore | 3.4449" |
| Stroke | 4.0709" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 14:1 |
| Bore/stroke ratio | 0.846 |
| Fuel type | gas |
|---|---|
| Advertised HP | 215–304 hp |
| Years | 2019–2026 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2023 | A25A-FXS net | 246 | — | — |
| 2024 | A25A-FXS net | 304 | — | — |
| 2025 | A25A-FXS net | 304 | — | — |
Factory specification sheet.
| Bore/stroke character | 0.846 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 4,071 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 38.0 ci |
| Static compression | 14:1 — high enough that pump premium or better is normally required |
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 |
|---|---|---|
| 2019 | 215 hp | A25A-FXS |
| 2020 | 215 hp | A25A-FXS |
| 2021 | 215 hp | A25A-FXS |
| 2022 | 215 hp | A25A-FXS |
| 2023 | 215 hp | A25A-FXS |
| 2023 | 246 hp | A25A-FXS |
| 2024 | 215 hp | A25A-FXS |
| 2024 | 246 hp | A25A-FXS |
| 2024 | 304 hp | A25A-FXS |
| 2025 | 215 hp | A25A-FXS |
| 2025 | 246 hp | A25A-FXS |
| 2025 | 304 hp | A25A-FXS |
| 2026 | 244 hp | A25A-FXS |
| 2026 | 246 hp | A25A-FXS |
| 2026 | 304 hp | A25A-FXS |
7 factory vehicles, 2018–2026. Each year opens that model's engine table.