the most powerful) of the Circle L engines. They also meet the Euro 4 standard, but feature a slightly lower compression ratio of 18.2:1. As in all Euro 4 engine an exhaust gas recirculation system is present. The maximum power reaches at 4000 rpm, with a peak torque of between 2000 and 2700 rpm. This engine was fitted in: Opel Corsa D 1.7 CDTI 16V 125hp (2006-11); Opel Corsa D GSi 1.7 CDTI ( 2007 -11); Opel Meriva 1.7 CDTI 16V 125hp (2006-10); Opel Astra 1.7 16V 5p CDTI 125hp (2007-09); Opel Astra H SW 1.7 CDTI 16V 125hp (2007-10); Opel Astra GTC 1.7 CDTI 16V 125hp (2007- 11 ). The abbreviation A17DTR identifies the Euro 5 variant, which has otherwise identical features and is fitted in: Opel Zafira B 1.7 CDTI 16V 125hp ( 2009 -14); Opel Astra J 1.7 CDTI 125hp (2010-11). A17DTS In 2010 the engine A17DTR was developed into the A17DTS: here the engine power has been increased to at 4000 rpm, while the maximum torque is increased to between 2000 and 2500 rpm. This variant has been fitted in: Opel Corsa D 1.7 CDTI (2011-13); Opel Astra J 1.7 CDTI 130cv (2011-14); Opel Meriva B 1.7 CDTI 130cv (2010-13); Opel Mokka 1.7 CDTI ( 2012 -15); Chevrolet Cruze 1.7 VCDi (2012-14); Chevrolet Trax 1.7 D ( 2013 - 15 ). Z17DTJ and A17DTJ This engine was the basis for the 1.7 Ecoflex: Maximum power reaches at 3800 rpm, with a maximum torque of at 2000 rpm. It is fitted in: Opel Astra H 1.7 CDTI 16v 110 bhp (2007-09); Opel Astra J 1.7 CDTI 16v 110 bhp (2010-15); Opel Astra GTC H / SW 1.7 CDTI 16v 110 bhp (2007-10 ); Opel Zafira B 1.7 CDTi 16v 110HP (2007-08). A17DTC and A17DTE This is the second diesel engine in the Opel engine range to be included in the EcoFlex range (the first was a 1.3 Multijet engine from Fiat). Introduced in 2008, is based on the Z17DTJ engine developed simultaneously, and is characterized by a reduction of friction of the moving parts in order to optimize the thermal efficiency and meet the stricter Euro 5 standard. Outputs are identical to those of the Z17DTJ. It is fitted in: Opel Meriva B 1.7 CDTi 16v 110HP (from 2010); Opel Zafira B 1.7 CDTi 16v 110HP (2008-14); Opel Astra J 1.7 CDTI 16v 110HP (2010-14). Honda The