Cessna Conquest I vs Commander 690
The Twin Commander 690 and Cessna Conquest are fast cabin-class turboprop twins — both prize speed; the 690 is the rugged, high-wing Commander, the Conquest the sleek Cessna (the 441 among the fastest turboprop twins).
Live Market Snapshot
Current asking-price market, aggregated across multiple marketplaces · refreshed daily
Cessna Conquest I
- For sale now
- 13
- Median asking
- $1,162,500
- Range
- $867,150–$2,135,000
- Model years available
- 1978–1985
Commander 690
No active listings right now.
Live data from AeroGurus, aggregated daily across the used-aircraft market. Figures are current asking prices, not appraisals — confirm with a pre-buy inspection.
Full Specs Comparison
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| Spec / Model | Cessna Conquest I | Commander 690 |
|---|---|---|
|
|
|
| Price Range | $867,150 – $2,135,000 | — |
| Category | Multi Engine Turboprop | — |
| Model Specifications | ||
| Seats | 8 | 7 |
| Horsepower | 450 HP | 717 HP |
| Cruise Speed | 283 kts (524 km/h) | 283 kts (524 km/h) |
| Range | 1,500 nm (2,778 km) | 1,454 nm (2,693 km) |
| Service Ceiling | 30,000 ft (9,144 m) | 31,000 ft (9,449 m) |
| Max Gross Weight | 8,600 lbs (3,901 kg) | 10,325 lbs (4,683 kg) |
| Useful Load | 3,000 lbs (1,361 kg) | 2,500 lbs (1,134 kg) |
| Fuel Capacity | 182.0 gal (689 L) | — |
| Fuel Burn | 70.0 GPH (265 L/h) | 70.0 GPH (265 L/h) |
| TBO | 3,500 hrs | — |
| Overhaul Cost | $200,000 | — |
| Annual Fixed | $55,000 | — |
| Hourly Variable | $650 | — |
| Engines | 2 x Turboprop | 2 x Turboprop |
Cost of Ownership
EstimateCessna Conquest I
Fuel$385/hr
Variable$650/hr
Annual Fixed$55,000/yr
Total (200 hrs/yr)
$185,000/yr
Commander 690
Fuel$385/hr
Which Should You Buy: Cessna Conquest I or Commander 690?
Bottom line: Choose by support, condition and cabin preference — both are fast, capable turboprop twins outside the King Air mainstream. The 690 offers rugged high-wing character; the Conquest offers Cessna systems and cabin. Verify specialist support and overhaul status on the specific airframe.
Pick the Conquest I if…
- More seats — 8 vs 7.
- Longer range — 1500 nm vs 1454 nm.
Pick the 690 if…
Auto-generated from current market data and published specs. Confirm with a pre-buy inspection and professional appraisal.
Frequently Asked Questions
What's the key difference between the Aero Commander 690 and Cessna Conquest?
Both are pressurised twin turboprops, with Conquest variants to note. The Aero Commander 690 (Garrett TPE331-5 turboprops, ~700 shp each, ~8 seats, ~280–300 kt, pressurised) is an older turboprop design with a dedicated operator community. The Cessna Conquest comes in two forms: the Conquest I (425, PT6A-112, ~450 shp each) and the Conquest II (441, TPE331-8, ~635 shp each) — both pressurised twins, the 441 using the same Garrett engine family as the Commander 690.
Aero Commander 690 or Cessna Conquest — which pressurised turboprop twin?
The Commander 690 and Conquest 441 share the Garrett TPE331 engine family, so maintenance overlap is meaningful. Buy the Conquest 441 if: the Cessna brand, deeper parts support, and TPE331 economics suit the mission. Buy the Commander 690 if: the Commander's heritage, configuration, and operator community appeal.
How does the Conquest I vs II affect this comparison?
The Conquest I (425, PT6A-powered) shares an engine ecosystem with King Air and TBM owners — a different overhaul base from the Commander 690. The Conquest II (441, TPE331-powered) shares engine heritage directly with the Commander 690, so parts and shop commonality is an advantage.
How do specs compare?
Aero Commander 690: TPE331-5 (~700 shp each), ~8 seats, pressurised, ~280–300 kt. Cessna Conquest II (441): TPE331-8 (~635 shp each), 8 seats, pressurised, ~270–290 kt.
Which is cheaper to operate?
Both use Garrett TPE331 variants — broadly similar overhaul costs. The Conquest 441's larger production run means more competition among shops. The Commander 690's smaller fleet may increase per-event maintenance cost.
Which should I buy?
Cessna Conquest II (441) for a TPE331-powered pressurised turboprop twin with better parts availability and Cessna support. Aero Commander 690 for the Commander heritage and configuration — when the Commander community and its specific characteristics are the preference.
Which is better, Cessna Conquest I or Commander 690?
It depends on your mission and budget.
The Conquest I cruises at 283 kts with 1,500 nm range.
The 690 cruises at 283 kts with 1,454 nm range.
Review the specs table above to find which fits your flying profile.
How do prices compare?
Prices vary by year, hours, avionics, and condition. Always get a pre-buy inspection.
What's the difference between Cessna Conquest I and Commander 690?
Conquest I engine: PRATT & WHITNEY PT6A-112 (450 hp).
Seats: 8 vs 7.
Cruise: 283 vs 283 kts.
Range: 1500 vs 1454 nm.
Which is cheaper to operate per hour?
Conquest I: about $650/hr variable cost.
Variable cost includes fuel, reserves and overhaul accruals. Annual fixed costs (hangar, insurance, annual inspection) add to the total.
Which has more seats and useful load?
Conquest I: 8 seats / 3,000 lb useful load.
690: 7 seats / 2,500 lb useful load.
Useful load = max gross weight minus empty weight; it determines how much fuel plus payload you can carry.
How does maintenance compare — TBO and overhaul cost?
Conquest I: 3,500-hour TBO, overhaul ~$200,000.
Reaching the time-between-overhaul (TBO) triggers a mandatory engine/airframe rebuild that affects resale value.
Disclaimer: All prices and cost estimates are from third-party sources for informational purposes only. Always obtain professional appraisal and inspection before purchase.
Prices updated daily · Data: FAA Registry, NTSB · About our data