Cessna Conquest I Aircraft 1970s

Pre-1980 turboprop twins are predominantly Beechcraft King Air 90 series (E90, F90 transitional) and early Cessna 441 Conquest. The PT6A turbines and TPE-331 platforms used here are very reliable; airframe age (45+ years) is the dominant pre-buy consideration. Hot section inspections, mandate compliance (ADS-B, FANS), avionics revision (often Pro Line 4 or even earlier Honeywell) all need careful audit.

The Cessna Conquest I (model 425) is the smaller of Cessna's two pressurised twin-turboprops — a cabin-class aircraft powered by two Pratt & Whitney Canada PT6A turbines, offering turbine reliability, a comfortable pressurised cabin and high-altitude capability. It bridges the gap between piston twins and larger business turboprops, cruising around 270 knots. See the live price range and median above for the Cessna Conquest I and 425 listings currently on the market.

Cessna Conquest I aircraft for sale

1 used Cessna Conquest I aircraft for sale 1970s · 8-seat · Used median asking $1,037,000 · updated yesterday

Cessna Conquest I Specifications

Model spec

The Cessna Conquest I is a 8-seat multi engine turboprop with a cruise speed of 272–283 kt (504–524 km/h), a range of 1,500–1,650 nm (2,778–3,056 km), and a useful load of 3,000–3,100 lbs (1,361–1,406 kg).

Performance
Cruise272–283 kt (504–524 km/h)
Max Speed289–296 kt (535–548 km/h)
Range1,500–1,650 nm (2,778–3,056 km)
Service Ceiling30,000–35,000 ft (9,144–10,668 m)
Engine & Fuel
EnginePRATT & WHITNEY PT6A-112
Horsepower450–635 HP
Fuel Capacity182.0–475.0 gal (689–1,798 L)
Fuel Burn70.0 GPH (265 L/h)
TBO3,500 hrs
Weights & Seats
Seats8–11
Max Gross Weight8,600–9,850 lbs (3,901–4,468 kg)
Useful Load3,000–3,100 lbs (1,361–1,406 kg)
Production1980–1985

Cessna Conquest I for Sale

Cessna Conquest I asking prices range from $829,000 to $1,550,000, with a median of $1,037,000 (market reference $900,000).

1978 Cessna Conquest I

1978 Cessna Conquest I for sale
Contact for Price
On Request
Reg# I-EDUS Italy
Location Rome, Rome
Via Aeroclub di Roma
Multiple sources
Listed 2mo ago

Cessna Conquest I Variants

Variant Years Seats Cruise Range Useful load Price range Best for Listings for sale
Conquest II 1977–1986 11 272 kts (504 km/h) 1,650 nm (3,056 km) 3,100 lbs (1,406 kg) $773K – $1.9M The larger, faster, TPE331-powered Conquest — for a buyer who wants the most capable cabin-class pressurised twin turboprop in Cessna's line. 6

Compare Cessna Conquest I

See how the Cessna Conquest I stacks up against similar aircraft in specs, price, and operating costs.

Cessna Conquest I vs Beechcraft King Air 200 Cessna Conquest I vs Cessna 421 Cessna Conquest I vs Commander 690

Cessna Conquest I Price & Cost

How much does a Cessna Conquest I cost? Used Conquest I prices: $829K – $1.6M, average $1M (median $1M); market reference $900K, across 8 priced of 1 active listings.

Cessna Conquest I Price Guide

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.

Cessna Conquest I Cost of Ownership estimate
Fuel (70.0 GPH × $6.20, 100 hrs)$43,400/yr
Annual Fixed (hangar, insurance, annual)$55,000/yr
Variable (per hour)$650/hr
Engine Overhaul (every 3,500 hrs)$200,000
Estimates at 100 flight hours/year. Actual costs vary by usage, location and insurance.

The Conquest I's dominant ownership cost driver is PT6A-112 hot-section and overhaul timing on both engines — the stagger between the two engines' time-since-overhaul significantly affects total cost. Confirm each engine's hours and hot-section status independently, and whether either engine is enrolled on a per-hour maintenance program.

Buying guides: Buyer's Guide | Financing Guide | Pre-Buy Inspection

Buying a Used Cessna Conquest I

Buying a Cessna Conquest I comes down to a focused pre-purchase checklist — here is what matters most on this model:

What to check before buying

The Cessna Conquest I (Model 425) was Cessna's entry-level pressurised turboprop twin — designed to bridge the gap between high-performance piston twins and the larger Conquest II. Built on the 421 Golden Eagle airframe and powered by two Pratt & Whitney Canada PT6A-112 engines (~450 shp each), it was produced in the first half of the 1980s.

What the PT6A-112 means for owners: The PT6A-112 is a derated, propjet-mounted member of the PT6A family — globally supported, with an enormous service network and readily available parts. The PT6A's flat-rated reliability is the Conquest I's primary ownership advantage over the piston-engined 421 it complements.

421 airframe heritage: The Conquest I shares its airframe with the Cessna 421 Golden Eagle piston twin. The pressurisation system, structure, and cabin layout are familiar to 421-experienced shops — a maintenance advantage compared to purpose-built turboprop airframes.

Versus the Conquest II: The Conquest II (Model 441) uses Garrett TPE331-8 engines and is significantly more powerful and faster, but the Garrett engine has a different support ecosystem than the PT6A. Buyers who value the PT6A's ubiquitous support — particularly for international operations — often prefer the Conquest I despite its lower power.

Buy it if: you want pressurised turboprop-twin capability with the PT6A support network that follows you worldwide. The Conquest II is faster and more capable; the Conquest I costs less and leverages PT6A support anywhere. For moderate missions its PT6A ecosystem gives it a long-term maintenance advantage over the Garrett-powered 441.

Frequently Asked Questions — Cessna Conquest I

What is the Cessna Conquest I?
The Conquest I (model 425) is the smaller of Cessna's two pressurised twin-turboprops — a cabin-class aircraft powered by two Pratt & Whitney Canada PT6A turbines, offering turbine reliability and a comfortable pressurised cabin.
What is the difference between the Conquest I and Conquest II?
The Conquest I (425) is the smaller, slower twin powered by PT6A turbines; the Conquest II (441) is the larger, faster aircraft powered by Garrett/Honeywell TPE331 turbines, with more range and cabin.
How much does a Cessna Conquest I cost?
Used Conquest I prices vary with engine status, avionics and condition. See the live price range and median above.
What are the Cessna Conquest I specifications?
The Conquest I cruises around 270 knots, a pressurised cabin-class twin turboprop with a typical range of roughly 1,500 to 1,800 nautical miles, depending on weight and reserves.
What engines does the Cessna Conquest I use?
Two Pratt & Whitney Canada PT6A turboprops, one of the most proven turbine engines in aviation.
How many seats does the Cessna Conquest I have?
Typically six to eight in a cabin-class layout, plus crew, depending on the interior configuration.
Is the Cessna Conquest I still in production?
No — Conquest production ended in 1986. Both Conquest models are well supported by parts and service networks for owner-flown and light-business use.

Cessna Conquest I Inventory by Country

United States12
Rome1
South Africa1

Cessna Conquest I Inventory by State

California3
Texas3
Colorado2
Florida2

Recently Sold Cessna Conquest I

1980 Conquest I$675,000

Cessna Conquest I Safety Record

No NTSB events on record for the Cessna Conquest I. Individual aircraft safety records may be available on detail pages.

Source: NTSB Aviation Accident Database

Disclaimer: All prices, cost estimates, and market values shown are based on asking prices from third-party sources and are provided for informational purposes only. AeroGurus is not an appraiser, broker, or financial advisor. Always obtain a professional appraisal and independent inspection before making a purchase decision.
Listings last refreshed yesterday · Data: FAA Registry, NTSB · About our data