Piper Seneca V (PA-34-220T)

The Piper Seneca first flew in 1971 as a twin-engine derivative of the Cherokee Six. The original Seneca had counter-rotating Lycoming IO-360s at 200 horsepower per side and stalled-by-design tail-down handling that made it controversial among twin pilots. Piper iterated through Seneca II (1975, turbocharged Continental TSIO-360s, fixed-pitch trim system replaced with stabilator), Seneca III (1981, more horsepower), and Seneca IV (1994, improved cabin and fuel system).

The Seneca V arrived in 1997 with intercooled TSIO-360-RB and -SB engines. The intercoolers reduced cylinder operating temperatures meaningfully and addressed durability issues that plagued earlier Senecas. The cabin was reworked, the panel was updated, and the gear system received some refinements. Production continued at low volume through the 2010s, with Piper periodically pausing and restarting deliveries based on training-fleet demand. The airplane has been Piper's flagship piston twin throughout the period, though Piper's volume aircraft remain the single-engine PA-28 family.

About 250 to 300 Seneca Vs were delivered between 1997 and the most recent production runs. ATP Flight School and several university aviation programs operate Seneca V fleets, which keeps the used market liquid and the parts supply healthy. Most Seneca Vs in private hands have at some point come from training fleets, which has implications for pre-buy diligence.

The Seneca V cruises at about 180 KTAS at 75% power and 8,000 to 10,000 feet, burning roughly 26 gph total (13 per side). At long-range cruise of 65%, the airplane drops to about 165 KTAS on 22 gph total. Time-to-climb to 10,000 feet at gross weight is about 12 minutes. The Seneca V will reach service ceiling of 25,000 feet with appropriate oxygen equipment, though most owners cruise at 8,000 to 12,000 feet to manage workload and fuel.

Single-engine performance is the Seneca's compromise. The airplane will hold about 240 fpm climb on one engine at sea level standard, weighing in below the Baron 58 (270 fpm) but above the Cessna 310R (220 to 250 fpm). The counter-rotating engines mean there is no critical engine. Either failure produces the same handling behavior, which simplifies pilot training and reduces the workload during an engine-out. Useful load is about 1,400 pounds. Full fuel (123 gallons usable) leaves about 660 pounds for people and bags. Six adults plus minimal bags works. Six adults plus full luggage means offloading fuel.

The Continental TSIO-360-RB (left) and TSIO-360-SB (right) are the Seneca V engines. Counter-rotating means the right-side engine has a different part number and turns the opposite direction from the left. Both engines have a 2,000-hour TBO (1,800 hours for early serial numbers, 2,000 hours for serial number 1006000 and later) per Continental Service Information Letter SIL 98-9E. They run on 100LL and have intercoolers that meaningfully extend cylinder life compared to the earlier Seneca turbo engines.

Field overhauls at Western Skyways or Continental factory exchange run $51,000 to $85,000 per engine in 2026 prices. Multiply by two. The lower end of the range is a field overhaul with reuse cylinders. The high end is a factory reman with new cylinders. Turbocharger maintenance is an additional consideration, with turbo work typically running $3,000 to $6,000 per side at overhaul time. Hartzell three-blade propellers on the Seneca V cost about $4,500 to $6,500 per side to overhaul on the 2,400-hour calendar cycle.

Oil consumption on healthy intercooled TSIO-360s runs about 0.3 to 0.5 quarts per hour per engine. The intercoolers do their job. Pre-V Senecas (II, III, IV) without intercoolers had documented cylinder problems at 800 to 1,200 hours. The Seneca V's cylinders typically reach TBO when the engines are flown regularly and managed conservatively.

Plan on $380 to $550 per flight hour at 150 hours a year of utilization, all-in. The Seneca V sits between the Baron 58 and the Cessna 310R on per-hour cost. Fuel and oil run about $150 to $190 per hour at 26 gph and $5.50 to $7 fuel. Engine overhaul reserve is $50 to $85 per hour for two engines at $51,000 to $85,000 each over 1,800 to 2,000 hour TBO. Prop reserve is $4 to $5 per hour for two props at $4,500 to $6,500 each. Airframe maintenance reserve is $50 to $80 per hour.

Annual fixed costs (hangar, insurance, annual inspection) add another $80 to $130 per hour at 150 hours a year of utilization. Insurance is the wildcard. First-time twin owners pay $11,000 to $22,000 a year for first-year coverage. Established Seneca V pilots with 300-plus hours in type pay $6,000 to $10,000. Training operations have different rate structures based on hull insurance models.

Acquisition cost in mid-2026: Early 1997-2002 Seneca Vs trade $400,000 to $500,000. Mid-cycle (2003-2010) examples run $500,000 to $600,000. Late-production (2011-2020) Seneca Vs with G1000 NXi avionics and lower hours run $600,000 to $750,000. The training-fleet pedigree on many Seneca Vs means a careful pre-buy is essential. Look for nose-gear hard-landing damage, cylinder work history, and intercooler hose condition.

Piper Owner Society is the type-club resource. The Seneca V has its own subforum and the organization runs Seneca-specific training events. Annual dues are about $80. Most insurance underwriters expect transition training with a Seneca-experienced instructor.