Allen O-675
# Allen O-675

The Allen Aircraft Engine Co. of Compton, a suburb of Los Angeles California, developed an eight-cylinder horizontally opposed aircraft engine during 1928–1929.

Little is known about this engine, other than that it was never given a Type Certificate and that it was not used on any known aircraft.

## Specifications (O-675)

Data from Aeroengines

### General characteristics

* Type: 8-cylinder horizontally opposed
* Bore: 4.75 in
* Stroke: 4.75 in
* Displacement: 673.4 ci
* Dry weight: 575 lb

### Components

* Cooling system: air-cooled
* Ignition system: dual ignition

### Performance

* Power output: 200 hp@1800 rpm
