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Toyota M20A-FKS specs: 2.0L (121.9 ci) 4-cylinder, 80.5 x 97.6 mm (3.1693 x 3.8425 in) bore and stroke, 13:1 compression. Rated 168-169 hp, 2019–2026.
The Toyota M20A-FKS is undersquare — the 3.8425" stroke exceeds the 3.1693" bore by 17.5% — a layout that trades peak RPM for leverage and torque low in the range. The 3.8425" stroke puts mean piston speed at 4,000 ft/min around 6,250 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 30.5 ci (499 cc).
13:1 on aluminum heads 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.
11 factory variants share these dimensions, rated from 168 to 169 hp across 2019–2026.
| Displacement | 121.9 ci / 2 L |
|---|---|
| Bore | 3.1693" |
| Stroke | 3.8425" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 13:1 * |
| Bore/stroke ratio | 0.825 |
* Compression ratio from a single source; not yet cross-verified.
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 168–169 hp |
| Years | 2019–2026 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2019 | M20A-FKS net | 168 @ 6600 | 151 lb-ft @ 4800 | — |
| 2020 | M20A-FKS net | 168 @ 6600 | 151 lb-ft @ 4800 | — |
| 2021 | M20A-FKS net | 168 @ 6600 | 151 lb-ft @ 4800 | — |
| 2022 | M20A-FKS net | 168 @ 6600 | 151 lb-ft @ 4800 | — |
| 2022 | M20A-FKS net | 169 @ 6600 | 151 lb-ft @ 4400 | — |
| 2023 | M20A-FKS net | 169 @ 6600 | 151 lb-ft @ 4400 | — |
| 2024 | M20A-FKS net | 169 @ 6600 | 151 lb-ft @ 4400 | — |
| 2025 | M20A-FKS net | 169 @ 6600 | 151 lb-ft @ 4400 | — |
| 2026 | M20A-FKS net | 169 @ 6600 | 151 lb-ft @ 4400 | — |
Factory specification sheet.
| Bore/stroke character | 0.825 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,843 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 30.5 ci |
| Static compression | 13:1 — 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 | 168 hp | M20A-FKS |
| 2020 | 168 hp | M20A-FKS |
| 2020 | 169 hp | M20A-FKS |
| 2021 | 168 hp | M20A-FKS |
| 2021 | 169 hp | M20A-FKS |
| 2022 | 168 hp | M20A-FKS |
| 2022 | 169 hp | M20A-FKS |
| 2023 | 169 hp | M20A-FKS |
| 2024 | 169 hp | M20A-FKS |
| 2025 | 169 hp | M20A-FKS |
| 2026 | 169 hp | M20A-FKS |
1 factory vehicle, 2019–2026. Each year opens that model's engine table.