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Plymouth EGG specs: 215 ci (3.5L) 6-cylinder, 3.78 x 3.189 in (96 x 81 mm) bore and stroke. Rated 253 hp, 1999–2002. Used in the Plymouth Prowler. SOHC.
The Plymouth 215ci (EGG) is oversquare — the 3.7795" bore exceeds the 3.189" stroke by 18.5% — a layout that favors airflow and RPM over leverage at the crank. The 3.189" stroke does not reach 4,000 ft/min of mean piston speed until about 7,550 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 35.8 ci (587 cc).
4 factory variants share these dimensions, rated at 253 hp across 1999–2002.
| Displacement | 215 ci / 3.5 L |
|---|---|
| Bore | 3.7795" |
| Stroke | 3.189" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 10–10.1:1 (published figures vary) |
| Bore/stroke ratio | 1.185 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Advertised HP | 253 hp |
| Years | 1999–2002 |
| Bore/stroke character | 1.185 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,189 ft/min — conservative for a street engine |
| Displacement per cylinder | 35.8 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 |
|---|---|---|
| 1999 | 253 hp | EGG |
| 2000 | 253 hp | EGG |
| 2001 | 253 hp | EGG |
| 2002 | 253 hp | EGG |
1 factory vehicle, 1999–2002. Each year opens that model's engine table.