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Lexus Dynamic Force specs: 2.4L (146.5 ci) 4-cylinder, 87.5 x 99.5 mm (3.4449 x 3.9173 in) bore and stroke, 11:1 compression. Rated 271-366 hp. DOHC.
The Lexus Dynamic Force is undersquare — the 3.9173" stroke exceeds the 3.4449" bore by 12.1% — a layout that trades peak RPM for leverage and torque low in the range. The 3.9173" stroke puts mean piston speed at 4,000 ft/min around 6,150 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 36.6 ci (600 cc).
11:1 on aluminum heads is high enough that pump premium or better is normally required.
It is one of 15 engines in the Dynamic Force family, sitting between the 121.9 ci and 210 ci members. 2 factory variants share these dimensions, rated from 271 to 366 hp. Factory fitments include the Lexus RX 500h F Sport Performance, Lexus TX 500h F Sport Performance, Lexus TX 550h+.
| Displacement | 146.5 ci / 2.4 L |
|---|---|
| Bore | 3.4449" |
| Stroke | 3.9173" |
| Cylinders | 4 |
| Compression ratio | 11:1 |
| Bore/stroke ratio | 0.879 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 271–366 hp |
| Bore/stroke character | 0.879 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,917 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 36.6 ci |
| Static compression | 11:1 — 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 |
|---|---|---|
| — | 271 hp | T24A-FXE |
| — | 366 hp | T24A-FTHS, T24A-FTS (Hybrid), T24A-FXTS |