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Acura JNC1 specs: 3.5L (213.1 ci) 6-cylinder, 91 x 89.5 mm (3.5827 x 3.5236 in) bore and stroke, 10:1 compression. Rated 573-600 hp, 2017–2022.
The Acura JNC1 is close to square: 3.5827" bore against 3.5236" stroke, within 1.7%, which splits the difference between a high-revving layout and a torque layout. The 3.5236" stroke puts mean piston speed at 4,000 ft/min around 6,800 RPM, which is where a production bottom end is generally considered at its limit. Each of the 6 cylinders displaces 35.5 ci (582 cc).
10:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 18 engines in the Honda J-series family, sitting between the 182.9 ci and 223.6 ci members. 6 factory variants share these dimensions, rated from 573 to 600 hp across 2017–2022.
| Displacement | 213.1 ci / 3.5 L |
|---|---|
| Bore | 3.5827" |
| Stroke | 3.5236" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 10:1 |
| Bore/stroke ratio | 1.017 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 573–600 hp |
| Years | 2017–2022 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2017 | JNC1 net | 573 | 476 lb-ft | 10:1 |
| 2018 | JNC1 net | 573 | 476 lb-ft | 10:1 |
| 2019 | JNC1 net | 573 | 476 lb-ft | 10:1 |
| 2020 | JNC1 net | 573 | 476 lb-ft | 10:1 |
| 2021 | JNC1 net | 573 | 476 lb-ft | 10:1 |
| 2022 | JNC1 net | 600 | 492 lb-ft | 10:1 |
Factory specification sheet.
| Bore/stroke character | 1.017 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,524 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 35.5 ci |
| Static compression | 10:1 — in the range that usually runs on pump premium |
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 |
|---|---|---|
| 2017 | 573 hp | JNC1 |
| 2018 | 573 hp | JNC1 |
| 2019 | 573 hp | JNC1 |
| 2020 | 573 hp | JNC1 |
| 2021 | 573 hp | JNC1 |
| 2022 | 600 hp | JNC1 |
1 factory vehicle, 2017–2022. Each year opens that model's engine table.