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Honda J35A8 specs: 3.5L (212.1 ci) 6-cylinder, 89 x 93 mm (3.5039 x 3.6614 in) bore and stroke, 11:1 compression. Rated 286 hp. Rod ratio and piston speed.
The Honda J35A8 is close to square: 3.5039" bore against 3.6614" stroke, within 4.3%, which splits the difference between a high-revving layout and a torque layout. The 3.6614" 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 6 cylinders displaces 35.4 ci (579 cc).
11:1 on aluminum heads is high enough that pump premium or better is normally required.
It is one of 13 engines in the J-series V6 family, sitting between the 152.6 ci and 224.6 ci members. Factory fitments include the Acura TL Type-S.
| Displacement | 212.1 ci / 3.5 L |
|---|---|
| Bore | 3.5039" |
| Stroke | 3.6614" |
| Cylinders | 6 |
| Compression ratio | 11:1 |
| Bore/stroke ratio | 0.957 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Advertised HP | 286 hp |
| Bore/stroke character | 0.957 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,661 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 35.4 ci |
| Static compression | 11:1 — high enough that pump premium or better is normally required |
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