Diamond DA42 vs Cessna 172
The Cessna 172 (single-engine trainer, ~115 kt) / 182 (single-engine hauler, ~140 kt) and Diamond DA42 Twin Star (four-seat composite twin Austro AE300 diesels, ~170 kt) are different propulsion classes — single vs twin.
Live Market Snapshot
Current asking-price market, aggregated across multiple marketplaces · refreshed daily
- For sale now
- 46
- Median asking
- $699,900
- Range
- $520,774–$1,100,160
- Listed on 2+ marketplaces
- 20
- Source marketplaces
- 7
- Model years available
- 2005–2026
- For sale now
- 421
- Median asking
- $134,231
- Range
- $61,563–$324,965
- Listed on 2+ marketplaces
- 112
- Source marketplaces
- 19
- Model years available
- 1956–2028
Live data from AeroGurus, aggregated daily across the used-aircraft market. Figures are current asking prices, not appraisals — confirm with a pre-buy inspection.
Generations Breakdown
Per-generation specs — engine/weight/performance differ materially across production eras.
Per-era “For sale” counts exclude listings with unspecified year and separate variants (RG retractable, Hawk XP), so they may not sum to the total above.
Diamond DA42 — 0 generations
| Generation | Years | Engine | MTOW | Cruise | Range | For sale |
|---|
Cessna 172 — 5 generations
| Generation | Years | Engine | MTOW | Cruise | Range | For sale |
|---|---|---|---|---|---|---|
| 172 Continental | 1956–1967 | Continental O-300 | 2300 | 118 | 520 | 107 |
| 172 O-320 150hp | 1968–1976 | Lycoming O-320-E2D | 2300 | 120 | 585 | 105 |
| 172 O-320 160hp | 1977–1986 | Lycoming O-320-H2AD/D2J | 2400 | 122 | 585 | 89 |
| 172R | 1996–2007 | IO-360-L2A | 2450 | 120 | 520 | 19 |
| 172S | 1998–now | IO-360-L2A | 2550 | 124 | 518 | 40 |
Safety Record
Absolute counts scale with fleet size — the most-produced types log more events without being less safe. Compare the % fatal.
| NTSB (1982–now) | Diamond DA42 | Cessna 172 |
|---|---|---|
| All events | 7 | 6810 |
| Serious | 1 | 542 |
| Fatal | 0 | 960 |
| Fatalities | 0 | 1802 |
| % Fatal | 0% | 14% |
Full Specs Comparison
| Spec / Model | Diamond DA42 | Cessna 172 |
|---|---|---|
|
|
|
| Price Range | $520,774 – $1,100,160 | $61,563 – $324,965 |
| Category | Multi Engine Piston | Single Engine Piston |
| Model Specifications | ||
| Seats | 4 | 4 |
| Horsepower | — | 145–180 HP |
| Cruise Speed | 170 kts (315 km/h) | 118–124 kts (230 km/h) |
| Range | 1,050 nm (1,945 km) | 518–585 nm (1,083 km) |
| Service Ceiling | 18,000 ft (5,486 m) | 14,000 ft (4,267 m) |
| Max Gross Weight | 3,935 lbs (1,785 kg) | 2300–2,550 lbs (1,157 kg) |
| Useful Load | 940 lbs (426 kg) | 878 lbs (398 kg) |
| Fuel Capacity | 50.0 gal (189 L) | 56.0 gal (212 L) |
| Fuel Burn | 12.0 GPH (45 L/h) | 8.6 GPH (33 L/h) |
| TBO | 1,800 hrs | 1,400 hrs |
| Overhaul Cost | $28,000 | $30,000 |
| Annual Fixed | $20,000 | $18,000 |
| Hourly Variable | $150 | $130 |
| Engines | 2 x Diesel | 1 x Piston |
Cost of Ownership
EstimateDiamond DA42
Cessna 172
Which Should You Buy: Diamond DA42 or Cessna 172?
Bottom line: Choose the 172/182 for single-engine economics and the largest support network. Choose the DA42 when you need twin-engine redundancy and modern composite construction with Jet-A diesel economics — particularly for IFR training and complex/multi-engine rating.
Pick the DA42 if…
- Faster cruise — 170 kts vs 118 kts.
- Longer range — 1050 nm vs 518 nm.
- Newer design — production from 2004 vs 1956.
Pick the 172 if…
- Budget matters — from $61,563 vs $520,774, you save ~$459,211.
- Lower operating cost — ~$130/hr vs $150/hr.
- More inventory — 428 listings vs 44.
Auto-generated from current market data and published specs. Confirm with a pre-buy inspection and professional appraisal.