A 630 DOHC HP
The V6 engine version named HP (High Power) has been specifically designed with the target to top the performance of this engine family with no compromise on fuel economy and emissions. Having achieved the target, this diesel engine is now the most powerful single turbo diesel engine in the market worldwide, with 200kW @4000 rpm.
The use of a Variable geometry turbo with ‘ball bearing’ technology, coupled with 2000 bar Common rail injection system and steel exhaust manifold manufactured with ‘air gap’ technology made this achievement possible. The ‘ball bearing’ turbo is based on ceramic ball bearing supporting the turbo shaft, instead of the more traditional oil lubricated bearing, obtaining a lower friction and a much faster response in terms of time and torque, during transient state at low rpm (“time to boost”), and a reduction of fuel consumption at full load.
The 2000 bar injection system, featuring the very latest injector model CRI2-20, ensures the top performance in terms of power, torque, fuel economy and noise. The extreme performance achieved required a special design of exhaust manifold, manufactured with ultra-high strength stainless steel AISI 309, with limited weight and size. The manifold is formed by two steel layers separated by an air gap, hence the name of ‘air gap’ manufacturing technology.
The Motori engine ACTUALLY has its roots with Cadillac. This engine was actually developed for the CTS' European folly's before the program was killed and FIAT gobbled up the other half of Motori from GM. While the blocks are the same the rest of the engine has been revamped. 
