page_title: Thielert Centurion
section_title: Variants
hierarchical_section_title: Thielert Centurion / Variants
caption_attribution_description: English: Thielert Centurion 1.7 diesel engine on a Diamond DA42 Twin Star at Sun 'n Fun 2006, Lakeland, Florida
context_page_description: The Thielert Centurion is a series of Diesel cycle aircraft engines for general aviation originally built by Thielert, which was bought by Aviation Industry Corporation of China's Tecnify Motors subsidiary and is currently marketed by Continental Motors. They are based on heavily modified Mercedes-Benz automotive engines.
context_section_description: Centurion 1.7 - Continental CD-135 (TAE 125-01)
  The first product introduced by Thielert, a 1689 cm³ (103 in³) engine producing 135 PS (99 kW) is an inline-four engine based on the Mercedes-Benz OM668 from Mercedes-Benz A-Class A 170 CDI (W168) with 80 mm bore and 84 mm stroke.
  The engine produces more power than a Lycoming O-320 above 4,000 ft, can maintain 93 kW (125 hp) till FL120, and burns 17.5 L/h (4.6 US gal/h) in cruise at FL175 for 72 kW (97 hp): 0.194 kg/kW/h (0.319 lb/hp/h).
  More than 1,500 Centurion 1.7s had been built until the end of 2006 when it was replaced by the Centurion 2.0. The in-service record of the 1.7 has been poor.
  A combination of design, service and support issues caused widespread customer dissatisfaction.
  Diamond then designed its own Austro Engines as an alternative to Thielert.
  The engines were later marketed as the CD-135 by Continental Engines and produced in St. Egidien, Germany before being granted final assembly in Fairhope, Alabama for the U.S. retrofit market in 2015.
  Centurion 2.0 (TAE 125-02-99)
  Introduced in late 2006. The main difference is a new Mercedes-Benz OM640 engine cylinder block from the Mercedes-Benz A 200 CDI (W169) with a displacement of 1991 cm³ (Ø83 x 92 mm). Other improvements include a more compact FADEC, a lighter cast gearbox housing, interfaces for glass cockpits and a new service tool that allows the FADEC to be programmed in the field. Dimensions of the Centurion 2.0 and 1.7 are nearly identical and the install kits are compatible, so a 1.7 at the end of its life can be replaced with a 2.0. The Centurion 2.0 is rated for a power output of 135 PS (99 kW), the same as the 1.7, but is EASA and FAA certified for 155 PS (114 kW). It has accumulated more than 1,000,000 flight hours without mechanical failures as of April 2008.
  Centurion 2.0 S (TAE 125-02-114)
  This 4-cylinder turbodiesel common rail direct injection with redundant FADEC control offers 155 PS (114 kW) providing a significant power increase compared to the 135 PS (99 kW) Centurion 2.0 for no additional weight. An engine kit may cost $89,000.
  Centurion 3.0
  Certified 20 June 2017 by Technify Motors GmbH (application: 19 December 2013), 2987 cm³ V6 four stroke Diesel piston engine with common rail high pressure direct fuel injection, turbocharger, 1:1.66 gearbox and electronic Engine Control Unit. 980 mm Length × 700 mm Height × 790 mm Width, 265 kg dry, 221 kW (300 HP) for 5 min, 202 kW (272 HP) Max. Continuous, both at 3880 rpm (2340 prop rpm) Same dimensions as the Mercedes-Benz OM642.
  Centurion 3.2
  Intended to fill the gap between the Centurion 2.0 and the 4.0 and designed to produce 230 hp (172 kW).  Development is largely complete, but the project is on hold.
  Centurion 4.0
  The 75° V8 DOHC 4 valves per cylinder was initially equipped with two turbochargers and weighting 283.5 kg (625 lb) dry for 228 kW max (310 hp) till FL80 at 2300 rpm at the propeller, and 176 kW (250 hp) in cruise for 29.5 l (7.8 US gal)/h and 25 l (6.6 US gal)/h at best economy, for 208 g/kW/h (0.342 lb/hp/h), it was planned for a production of 600 per year.
  Designed as a larger engine to replace the 300 hp (224 kW) gasoline engines and developed from the Mercedes-Benz OM629 automobile engine, it produced 350 hp (261 kW) later with a larger single turbocharger.
  After the insolvency of Thielert in April 2008 all work on the Centurion 4.0 was frozen.
  Continental CD-155
  Is the Continental Motors, Inc. brand name of the Centurion 2.0S with 155 PS (114 kW). The engine must be replaced every 2,100 hours, the gearbox  has to be replaced for an inspection at 900 hours, the high-pressure pump has a life limit of 600 hours, the alternator of 600 hours, friction disk of 900 hours, V-ribbed belt of 1,200 hours, alternator excitation battery of 12 months. Fuel, oil, and cooling lines are replaced at 60 months except for the Robin DR400 where these items are 'on condition' with no set life-limit. The dual mass flywheel, which is intended to have the same life as the engine, is tested in-situ at 1,200 hours.
  Continental CD-170
  A four-cylinde
caption: Centurion 1.7 installation in a Diamond DA42
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