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Ram Viper V10 specs: 505 ci (8.3L) 10-cylinder, 4.032 x 3.961 in (102.4 x 100.6 mm) bore and stroke. Rated 500 hp, 2004–2006. Used in the Ram 1500. OHV.
The Ram Viper V10 is close to square: 4.0315" bore against 3.9606" stroke, within 1.8%, which splits the difference between a high-revving layout and a torque layout. The 3.9606" stroke puts mean piston speed at 4,000 ft/min around 6,050 RPM, which is where a production bottom end is generally considered at its limit. Each of the 10 cylinders displaces 50.5 ci (828 cc).
It is one of 3 engines in the Viper family, the largest at 505 ci. 3 factory variants share these dimensions, rated at 500 hp across 2004–2006.
| Displacement | 505 ci / 8.3 L |
|---|---|
| Bore | 4.0315" |
| Stroke | 3.9606" |
| Cylinders | 10 |
| Configuration | V10 |
| Bore/stroke ratio | 1.018 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 500 hp |
| Years | 2004–2006 |
| Bore/stroke character | 1.018 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,961 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 50.5 ci |
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 |
|---|---|---|
| 2004 | 500 hp | Viper V10 |
| 2005 | 500 hp | Viper V10 |
| 2006 | 500 hp | Viper V10 |