Beechcraft Baron 58 (1970-2005) vs Piper PA-34-220T Seneca V
Head-to-head — specs, at a glance.
iBeechcraft Baron 58 (1970-2005)
**Which airplane the specifications above describe.** This page covers the whole Baron 58 line, 1970 through 2005, but its frontmatter describes exactly one airplane: the **Model 58, S/N TH-773 and after, within the Continental IO-520-C engine block** — S/N TH-1 through TH-1395 except TH-1389, which is **65.6% of the 2,124 serials TCDS 3A16 Section X makes eligible for the type**, the certificate's clear majority (runbook rule 23). It is also the only block for which a primary Pilot's Operating Handbook was located this session, so it is the block whose cruise, range and endurance figures above can actually be traced to a document rather than carried over unsourced. Every other configuration below — the 1984-and-later IO-550-C run, the 58A reduced-gross variant, and the 58TC/58P — is a row in the Variants table with its own figures, or a flagged gap where no reliable figures were found this session.
- +Dual cargo doors enable stretcher/bulk loading and flexible passenger boarding
- +Twin-engine redundancy with solid single-engine ceiling (8,425 ft)
- +185 KTAS cruise with comfortable 6-seat cabin
- !Right-side cargo door seals prone to deterioration; water intrusion and cabin drafts common
- !IO-520-C engines (pre-1984) known for mid-time top-end cylinder issues
- !Single-engine service ceiling below gross weight—decision-making margin tight
Piper PA-34-220T Seneca V
**This page describes the turbocharged Seneca line — Seneca II through Seneca V — built 1975 through 2019.** The original naturally aspirated Seneca I (1972–1975) has its own page, Piper PA-34-200 Seneca I, split off on 2026-09-08. All five generations remain on one FAA type certificate (A7SO); see "Why the Seneca I split off," below, for the reasoning.
- +Counter-rotating engines eliminate critical-engine handling; ideal multi-engine trainer
- +Spacious six-seat cabin with aft cargo door; practical business transport
- +Turbocharged variants cruise 188–195 knots at altitude with 700 nm IFR range
- !Twin-engine operating costs ($35k–$45k annually at 100 hours); uneconomical for local flying
- !Nose gear collapse risk from bolt fatigue and rigging neglect; repetitive AD inspection burden
- !TSIO-360 top-end distress common if lean-of-peak operation poorly monitored; compression checks essential
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