Mooney M20TN Acclaim

Mooney introduced the M20TN Acclaim in 2006 as the turbocharged variant of the M20R Ovation. The Acclaim used a twin-turbocharged Continental TSIO-550-G engine derived from the Ovation's naturally-aspirated IO-550-G. Both intercoolers and twin turbochargers gave the engine extended high-altitude operation capability while managing operating temperatures. Service ceiling was raised to FL250 (operational), giving the Acclaim meaningful altitude flexibility for cross-country missions.

Mooney refined the airplane through several sub-variants. The Acclaim Type S (2007) was certified to 242 KTAS max cruise, setting the production single-engine piston speed record. The Acclaim Ultra (2017) added Garmin G1000 NXi avionics. Production has been intermittent through the 2010s and 2020s as Mooney has navigated various corporate transitions. The current production status of the Acclaim line is uncertain in 2026, with limited new production occurring at the Mooney Kerrville facility.

Total Acclaim production is roughly 350 aircraft across all variants. The fleet has remained popular with cross-country pilots who want the absolute fastest piston single available. Mooneyspace.com covers the Acclaim with substantial type-specific knowledge including the demanding turbo operation discipline that the TSIO-550-G requires.

The M20TN Acclaim cruises at about 215 KTAS at FL200 burning 17 gph of 100LL. The Acclaim Type S is certified to 242 KTAS at maximum cruise, which is the production single-engine piston speed record. At long-range cruise (lower power settings), the airplane drops to about 190 KTAS on 14 gph. Service ceiling is FL250 (operational), providing meaningful altitude flexibility for weather routing.

Useful load on an Acclaim is about 900 to 1,000 pounds. Full fuel (102 gallons usable) leaves about 425 to 525 pounds for people and bags. The Mooney cabin is compact and the Acclaim shares the same general dimensions as the Ovation. Range with reserves is about 1,400 nm at long-range cruise. The combination of speed, range, and altitude capability makes the Acclaim one of the most-capable piston cross-country airplanes ever produced.

The Continental TSIO-550-G is the engine on every M20TN Acclaim. It's a six-cylinder, horizontally opposed, fuel-injected, twin-turbocharged piston rated at 280 hp at 2,500 RPM. Continental's published TBO is 2,000 hours (2,200 hours for serial number 1006000 and later) per Continental Service Information Letter SIL 98-9E. The TSIO-550-G is also used in the Cirrus SR22T, with similar operating characteristics.

Field overhauls at Western Skyways, Mattituck, or other reputable Continental turbo shops run $65,000 to $85,000 in 2026 prices. The twin turbochargers add substantially to overhaul cost compared to non-turbocharged six-cylinders. Plan on additional $7,000 to $14,000 for turbocharger work at overhaul time. The Hartzell three-blade scimitar propeller standard on the Acclaim runs $4,000 to $7,000 to overhaul.

Oil consumption on a healthy TSIO-550-G runs about 0.5 to 0.8 quarts per hour. The engine demands disciplined CHT and TIT management during high-altitude high-power operation. Cylinder work at top-overhaul intervals (around 800 to 1,200 hours on hard-flown engines) is more common on the TSIO-550 than on the naturally-aspirated IO-550. Engine monitor installation is standard on the Acclaim.

Plan on $400 to $570 per flight hour at 150 hours a year of utilization, all-in. The Acclaim is meaningfully more expensive to operate than the Ovation due to the twin turbochargers. Fuel and oil run about $97 to $122 per hour at 17 gph and $5.50 to $7 for 100LL. Engine overhaul reserve is $33 to $43 per hour. Prop overhaul reserve adds $2.50 to $4.00 per hour. Airframe maintenance reserve is $50 to $75 per hour due to turbo system, gear, and Mooney-specific items.

Annual fixed costs (hangar, insurance, annual inspection) add another $90 to $160 per hour at 150 hours a year of utilization. Insurance on the Acclaim is meaningfully higher than other Mooneys due to high hull values and the turbo/altitude operation. First-time Acclaim owners pay $5,500 to $11,000 a year typically. Established Acclaim pilots with 200+ hours in type pay $3,500 to $6,500.

Acquisition cost in mid-2026: Original Acclaims (2006) trade $285,000 to $385,000. Acclaim Type S aircraft (2007-2016) trade $370,000 to $500,000. Acclaim Ultra aircraft (2017+) trade $475,000 to $625,000. The most-recent Acclaim Ultras with G1000 NXi and low hours are at the high end.

Mooneyspace.com and Mooney Caravan provide essential type-club support. The Acclaim has accumulated 20 years of fleet experience and the community has substantial knowledge about the demanding turbo operation, intercooler maintenance, and the various sub-variants.