Article · Wikipedia archive · Last revised May 31, 2026

Austro Engine E4

The Austro Engine E4 is a liquid-cooled, inline, four-cylinder, four-stroke, aircraft diesel engine. The engine is manufactured by Austro Engine, an Austrian-based company and subsidiary of Diamond Aircraft Industries.

Last revised
May 31, 2026
Read time
≈ 1 min
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303 w
Citations
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Source
Austro Engine E4 (AE 300)
TypeFour-cylinder four-stroke aircraft engine
National originAustria
ManufacturerAustro Engine
First run2008
Major applicationsDiamond DA42
Number built> 1,5001

The Austro Engine E4 (marketed as the AE 300) is a liquid-cooled, inline, four-cylinder, four-stroke, aircraft diesel engine.23 The engine is manufactured by Austro Engine, an Austrian-based company and subsidiary of Diamond Aircraft Industries.

Development

The engine is based on the Mercedes-Benz OM640 road Diesel engine.4

Following Diamond's "General Aviation Single Point of Contact" strategy, Austro Engine started to design a new engine for use on Diamond products in 2005. It received its type certificate in January 2009.2

Applications

Specifications (E4)

Data from Austro Engine and type certificate123

General characteristics

Components

Performance

  • Power output: 168 hp (125 kW) (maximum takeoff and continuous power) at up to 2,300 propeller RPM
  • Specific power: 1.38 hp/cu in (62.80 kW/L)
  • Fuel consumption: 35 L/h (9.25 US gal/h) at 100% power, and
19 L/h (5.02 US gal/h) at 60% power
References

References

  1. "AE300 Facts & Specifications" (PDF). austroengine.at. Austro Engine. pp. 1–3. Retrieved 1 September 2017.
  2. "Type Certificate Data Sheet E.200 Austro Engine E4 series engines" (PDF). European Aviation Safety Agency. 2015-04-13. Archived from the original (PDF) on 2015-10-04. Retrieved 2016-02-29.
  3. "AE300 Technical Data" (PDF). Austro Engine. Retrieved 2014-11-14.
  4. "We Fly: Diamond DA62". 2 December 2015.
External links