Chevrolet 427ci 14.58:1 Specs
Chevrolet Chevrolet 427ci · 4.125" × 4.000" · 14.58:1 engine specs: 427 ci (7L), 8-cylinder, 4.125" bore x 4" stroke, 14.58:1 compression.
Dimensions
| Displacement | 427 ci / 7 L |
|---|
| Bore | 4.125" |
|---|
| Stroke | 4" |
|---|
| Cylinders | 8 |
|---|
| Configuration | V8 |
|---|
| Compression ratio | 14.58:1 |
|---|
| Rod length | 6.1" |
|---|
| Rod ratio | 1.525 |
|---|
| Bore/stroke ratio | 1.031 |
|---|
Construction
| Block material | cast iron |
|---|
| Head material | cast iron |
|---|
| Valvetrain | OHV |
|---|
| Fuel type | gas |
|---|
| Advertised HP | 425–470 hp |
|---|
| Years | 2012–2023 |
|---|
What these numbers mean
| Bore/stroke character | 1.031 — square — bore and stroke are within 5%, a balanced compromise |
|---|
| Mean piston speed at 6,000 RPM | 4,000 ft/min — in the range typical of performance street engines |
|---|
| Rod ratio | 1.525 — short — more side loading and piston dwell at TDC, typical of stroker combinations |
|---|
| Displacement per cylinder | 53.4 ci |
|---|
| Static compression | 14.58:1 — high enough that pump premium or better is normally required |
|---|
Cylinder head
| Intake valve diameter | 2.205" |
|---|
| Exhaust valve diameter | 1.615" |
|---|
Run the numbers for this engine
Each link opens the calculator with this engine's specs already filled in.
Variants sharing these dimensions (11)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|
| 2012 | 425 hp | — |
| 2013 | 425 hp | — |
| 2014 | 430 hp | — |
| 2015 | 430 hp | — |
| 2016 | 470 hp | — |
| 2017 | 470 hp | — |
| 2018 | 470 hp | — |
| 2019 | 470 hp | — |
| 2020 | 470 hp | — |
| 2022 | 470 hp | — |
| 2023 | 470 hp | — |
Similar engines
← All Chevrolet 427ci engines