See other engines in this family
Porsche M48.01 specs: 4.8L (293 ci) 8-cylinder, 96 x 83 mm (3.7795 x 3.2677 in) bore and stroke, 12.5:1 compression. Rated 385-420 hp, 2007–2014.
The Porsche M48.01 is oversquare — the 3.7795" bore exceeds the 3.2677" stroke by 15.7% — a layout that favors airflow and RPM over leverage at the crank. The 3.2677" stroke does not reach 4,000 ft/min of mean piston speed until about 7,350 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 8 cylinders displaces 36.6 ci (600 cc).
12.5:1 is high for a production gasoline engine; running a ratio like that on pump fuel depends on chamber design and fuel delivery rather than the number alone.
It is one of 2 engines in the Porsche 293ci family, all of them 293 ci — the differences between them are in compression, heads and rating, not displacement. 13 factory variants share these dimensions, rated from 385 to 420 hp across 2007–2014.
| Displacement | 293 ci / 4.8 L |
|---|---|
| Bore | 3.7795" |
| Stroke | 3.2677" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 12.5:1 |
| Bore/stroke ratio | 1.157 |
| Fuel type | gas |
|---|---|
| Advertised HP | 385–420 hp |
| Years | 2007–2014 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2009 | M48.01 net | 385 @ 6200 | 369 lb-ft @ 3500 | 12.5:1 |
| 2010 | M48.01 net | 385 @ 6200 | 369 lb-ft @ 3500 | 12.5:1 |
| 2011 | M48.01 net | 400 @ 6500 | 369 lb-ft @ 3500-5000 | 12.5:1 |
| 2012 | M48.01 net | 400 @ 6500 | 369 lb-ft @ 3500-5000 | 12.5:1 |
| 2013 | M48.01 net | 400 @ 6500 | 369 lb-ft @ 3500-5000 | 12.5:1 |
| 2013 | M48.01 net | 420 @ 6500 | 380 lb-ft @ 3500 | 12.5:1 |
| 2014 | M48.01 net | 400 @ 6500 | 369 lb-ft @ 3500 | 12.5:1 |
| 2014 | M48.01 net | 420 @ 6500 | 380 lb-ft @ 3500 | 12.5:1 |
Factory specification sheet.
| Bore/stroke character | 1.157 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,268 ft/min — conservative for a street engine |
| Displacement per cylinder | 36.6 ci |
| Static compression | 12.5:1 — high enough that pump premium or better is normally required |
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 |
|---|---|---|
| 2007 | 385 hp | M48.01 |
| 2008 | 385 hp | M48.01 |
| 2008 | 405 hp | M48.01 |
| 2009 | 385 hp | M48.01 |
| 2009 | 405 hp | M48.01 |
| 2010 | 385 hp | M48.01 |
| 2010 | 405 hp | M48.01 |
| 2011 | 400 hp | M48.01 |
| 2012 | 400 hp | M48.01 |
| 2013 | 400 hp | M48.01 |
| 2013 | 420 hp | M48.01 |
| 2014 | 400 hp | M48.01 |
| 2014 | 420 hp | M48.01 |
1 factory vehicle, 2007–2014. Each year opens that model's engine table.