Diamond DA42 Aircraft
The Diamond DA42 Twin Star is the modern composite twin that replaced legacy piston twins as the volume multi-engine trainer and light family twin. Twin Austro AE300 diesel engines (modern fleet) or Thielert TAE 125 diesels (early fleet — see warnings below), ~170 kt cruise, factory Garmin G1000 NXi avionics, four-seat composite cabin. The DA42's combination of twin- engine redundancy, Jet-A operating economics and modern systems made it the multi-engine training benchmark and the light-twin family hauler at materially lower operating cost than legacy Avgas-powered piston twins. Production variants: DA42 (Thielert TAE 125, 2004-2008 — significant engine issues), DA42 NG (Austro AE300, 2009-2013), DA42 VI (Austro AE300 refined, 2013-current).
46 used Diamond DA42 aircraft for sale · 4-seat · Used median asking $699,000 · updated 13 hours ago
Diamond DA42 Specifications
Model specThe Diamond DA42 is a 4-seat multi engine piston with a cruise speed of 170 kt (315 km/h), a range of 1,050 nm (1,945 km), and a useful load of 940 lbs (426 kg).
Diamond DA42 for Sale
Browse all listings →Diamond DA42 asking prices range from $510,000 to $1,133,396, with a median of $699,000 (market reference $700,000).
Compare Diamond DA42
See how the Diamond DA42 stacks up against similar aircraft in specs, price, and operating costs.
Diamond DA42 Price & Cost
How much does a Diamond DA42 cost? Used DA42 prices: $510K – $1.1M, average $699K (median $699K); market reference $700K, across 27 priced of 46 active listings.
Key price factors: engine time to overhaul, year and airframe hours, avionics, damage history and logbook completeness — see the buying guide below for the full pre-purchase checklist.
Diamond DA42 Value by Model Year
Median asking price by year of manufacture. Newer airframes command a premium; value falls with age then plateaus on older models.
Lowest around $590,548 (2008 models) · highest around $1,016,648 (2020). Bars scaled across the range to show the depreciation curve; hover for exact medians.
Buying a Used Diamond DA42
Buying a Diamond DA42 comes down to a focused pre-purchase checklist — here is what matters most on this model:
What to check before buying
Frequently Asked Questions — Diamond DA42
Cost?
Thielert vs Austro engine — how important?
DA42 vs DA62?
Twin-diesel benefit?
Multi-engine training use?
Diamond DA42 Inventory by Country
| United States | 17 |
| United Kingdom | 3 |
| Austria | 3 |
| Canada | 2 |
| Germany | 2 |
| Switzerland | 2 |
Diamond DA42 Inventory by State
| North Carolina | 8 |
| Florida | 4 |
Diamond DA42 Safety Record
Across all DA42 variants, 7 NTSB-recorded events are on file from 2016–2024. As with any aircraft, most outcomes depend on pilot training, maintenance and operating conditions rather than the airframe itself.
7
Total Events
4
Incidents
1
Serious
0
Fatal
Most Recent Events
| Date | Location | Severity | Probable Cause |
|---|---|---|---|
| Nov 21, 2024 | Ben Slimane, | Incident | — |
| Sep 01, 2024 | Mandan, ND | Incident | — |
| May 09, 2022 | Lehighton, PA | Minor | The flight instructor’s inadequate supervision of the flight and his failure to secure the right engine following an uns… |
| Aug 09, 2021 | Hiddenite, NC | Incident | The flight instructor’s inability to stop the descent following a practice emergency descent for reasons that could not … |
| Apr 01, 2020 | Palm Coast, FL | Incident | The pilot receiving instruction’s failure to maintain airplane control during a simulated engine failure landing and sub… |
NTSB records 2016–2024. Includes all Diamond DA42 variants. Events ≠ aircraft fault.