The Diamond DA40 is not one aircraft. It's five or six, depending on how you count — spanning more than two decades of production, two different engine philosophies, and a price range that stretches from $160,000 for a well-used original to over $640,000 for a near-new diesel variant.
That price spread is not arbitrary. Each generation of DA40 represents a meaningful step change in capability, operating cost, and complexity. Buying the wrong one — or buying without understanding what distinguishes them — is an expensive mistake.
Here's what 700+ sales on Sprinkle tell us about the DA40 market, which variant makes sense for which buyer, and what to expect when you go looking.
Diamond launched the DA40 as the four-seat successor to their popular two-seat DA20. The original used a Lycoming IO-360-M1A producing 180hp on avgas, initially with a fixed-pitch prop and later with a constant-speed propeller that meaningfully improved performance.
The airframe was ahead of its time: composite construction, T-tail, bubble canopy with extraordinary visibility, side-by-side seating for two with two rear seats, and a handling quality that pilots describe as noticeably more refined than equivalent metal aircraft from the same era.
Our data on original DA40s (83 CESSNA 177-designated equivalent: 87 sales in 2024) shows a median of $259,000 and an average of $240,000, with the range running from $159,900 (high-time or tired example) to $330,000 for clean, updated aircraft. The DA40-180 Star variant — the early fixed-pitch version — sells in a similar band ($235,000–$275,000 for good examples).
These are excellent aircraft at accessible prices. The main caveat: early examples may have original avionics that have aged badly. Factor in an avionics upgrade if the panel isn't already modernised.
Diamond was ahead of the industry in pursuing diesel power. The DA40 TDI used a Thielert Centurion diesel engine running on Jet-A, offering dramatically lower fuel burn than the avgas alternative. On paper it was compelling: around 4–5 gallons per hour versus 8+ for the Lycoming, with Jet-A available at far more airports internationally than avgas.
In practice, the Thielert engine had reliability issues that proved commercially fatal for the engine maker. Thielert went bankrupt in 2008. Parts and support became difficult. Many TDIs have since been re-engined or converted.
We see relatively few TDIs trade as pure TDIs in our data — most appear in small numbers at varying prices reflecting their re-engined or original condition. If you're looking at a DA40 TDI with the original Thielert engine, the engine's remaining TBO and support situation is the most important part of the pre-buy conversation. Proceed carefully.
The XL series refined everything about the original DA40 while keeping the proven Lycoming avgas engine. The DA40 XL added a constant-speed prop as standard, revised landing gear, improved useful load, and a cleaner interior. The DA40 XLS (2007 onward) added the Garmin G1000 glass cockpit as standard and further refined the avionics suite.
These are arguably the sweet spot of the avgas DA40 family. The engineering maturity of a decade of refinement, the simplicity of a proven Lycoming engine, and — crucially — prices that are significantly lower than the NG models:
A 2007–2009 DA40 XLS with the G1000 and low hours is a formidable touring aircraft. The Lycoming IO-360 is a known quantity: your local A&P can work on it, overhaul support is strong, and avgas is available at virtually every US airport.
→ Browse DA40 XLS listings on Sprinkle
Where the TDI diesel was a first attempt, the NG is the refined article. The Austro AE300 engine — developed by a Diamond subsidiary, based on a Mercedes turbodiesel architecture — produces 168hp on Jet-A and brings FADEC (Full Authority Digital Engine Control) to a single-engine piston aircraft.
What FADEC means in practice: one power lever, automatic mixture and prop management, no carb heat, no mixture leaning. From a pilot workload standpoint, the NG is closer to a turboprop than a traditional piston. From a running cost standpoint, the numbers are compelling — 5.1 gallons per hour at 126 knots economy cruise, 8.2 gph at 150 knots at altitude.
The Austro AE300 also has a TBO of 2,100 hours — meaningfully longer than the Lycoming's 2,000 hours — and Jet-A fuel is available at essentially every airport on Earth, including many international destinations where avgas is difficult or impossible to source.
The market reflects the NG's premium. Our data shows 197 combined NG sales in 2024 — the highest volume of any DA40 variant — with a median price of $525,000–$540,000. Near-new examples (2022–2023) regularly ask $519,000–$639,000. A 2023 DA40 NG with under 400 hours is currently listed on Sprinkle at $539,000.
→ See Diamond DA40 NG listings on Sprinkle
Diamond's current production DA40 XLT offers the modern airframe and Garmin G1000 NXi avionics suite with the familiar Lycoming IO-360-M1A avgas engine. It's the choice for buyers who want new-production quality but prefer the simplicity of a conventional piston engine and avgas fuel.
New 2025 DA40 XLTs are asking around $580,000. At that price, the NG's operating cost advantages over the Lycoming version are worth considering carefully: the Jet-A diesel's lower fuel consumption and simpler engine management may justify the similar price point for high-utilisation owners, while the XLT's conventional engine is arguably preferable for low-utilisation private owners who value simplicity over running cost optimisation.
Based on our 2024 sales data:
| Variant | Median Price | Typical Range | Sales in 2024 |
|---|---|---|---|
| DA40 / DA40-180 Star | $259,000 | $160K–$330K | 87 |
| DA40 XL | $339,000 | $220K–$360K | 17 |
| DA40 XLS | $410,000 | $275K–$426K | 49 |
| DA40 NG | $525,000 | $415K–$714K | 197 |
| DA40 XLT (new) | ~$580,000 | $539K–$580K | 30 |
The spread is significant: you can enter the DA40 family for around $160,000 in an early original, or spend $640,000 on a near-new diesel. The question is whether the additional $400,000 buys you $400,000 of aircraft.
→ Full Diamond DA40 price guide on Sprinkle
Regardless of variant, the DA40 offers a flying experience that's genuinely different from most piston singles of comparable price.
The canopy. The DA40's large sliding canopy gives visibility that no Cessna or Piper can match. You don't look through windows — you sit in a glass bubble. For VFR cross-country work and aeronautical sightseeing, it's exceptional. For pilots who feel claustrophobic in traditional metal aircraft, it's transformative.
Handling. Diamond aircraft are consistently praised for their stick forces and control harmony. The DA40 is no exception — it's responsive without being sensitive, and it's an aircraft that rewards good technique. Pilots transitioning from Cessnas typically comment on how much more satisfying it is to fly precisely.
Safety record. The DA40's composite construction and carefully engineered energy-absorbing structure has contributed to a better-than-average accident outcome record compared to equivalent aircraft. The fixed gear eliminates one major failure mode entirely.
Composite construction. No corrosion. This is not a trivial advantage for owners in humid climates, coastal areas, or anywhere that avgas or moisture accumulation would otherwise attack an aluminium airframe over decades. Diamond's composites age well.
This is the central choice for most DA40 buyers. Here's how to think about it honestly:
Buy an avgas DA40 (original, XL, XLS, or XLT) if:
Buy a DA40 NG if:
For a pilot flying 75 hours per year based at a US airport with both fuels available, a well-maintained DA40 XLS at $385,000 is a more sensible buy than a DA40 NG at $540,000 — the $155,000 price gap would take decades to recover through fuel savings alone. For a pilot flying 200+ hours per year on international routes, the NG's economics start to look compelling.
Avionics generation. Early DA40s may have original Garmin GNS 430/530 or older equipment. The G1000 standard from the XLS onward is well-supported, but even G1000 units are now ageing — check software currency. Budget for an avionics refresh if the aircraft you're considering is still on original 2005-era equipment.
Engine hours and overhaul history. The Lycoming IO-360 has a 2,000-hour TBO; the Austro AE300 has 2,100 hours. Ask for the engine logs and understand where the aircraft sits in its TBO cycle. An engine within 200 hours of TBO should be reflected in the asking price.
Composite inspection. DA40s don't corrode, but composites can delaminate, sustain hidden damage from hard landings, or develop moisture intrusion around inspection panels. A pre-buy on a composite aircraft should include a tap test of critical structural areas. Diamond maintains a network of authorised service centres.
TDI engine status (if applicable). If the aircraft you're considering has the original Thielert Centurion diesel, get a very detailed accounting of the engine support situation before proceeding. Many have been re-engined with Lycoming or Austro motors — confirm what's installed.
Canopy condition. The DA40's large canopy is expensive to replace. Check for crazing, delamination, or scratches that impair visibility or structural integrity.
More than any other single-engine piston in our database, the DA40 has a genuinely international resale market. We currently have DA40s listed from the US, Germany, France, Greece, Hungary, South Africa, and Canada. This matters for pricing context: European DA40s often carry EUR pricing and may have different avionics standards or maintenance histories.
Diamond is an Austrian manufacturer — the aircraft has deep roots in Europe, strong support from the European network, and type familiarity among European A&Ps that's comparable to what Cessna and Piper enjoy in the US.
The DA40 buyer typically values flying quality over convention. They want something that handles better than a Cessna 172 or Piper Arrow, that offers exceptional visibility, and that feels like a purpose-built machine rather than a legacy design updated over decades.
At the accessible end ($200,000–$300,000 for an early original or DA40-180), the DA40 competes with the Cirrus SR20 and Piper Arrow. It wins on handling and feels more modern despite comparable age. It loses on Cirrus's CAPS parachute system if that matters to you.
At the premium end ($500,000+ for a modern NG), it competes with low-time Cirrus SR22s and approaches the price of a DA42 twin. At that budget, the NG's diesel economics and FADEC simplicity make a compelling argument — particularly for pilots who fly a lot.
Whatever variant you're considering, the DA40 is one of the more carefully engineered general aviation aircraft of the past 25 years. The variant complexity is real, but navigable with the right information.