They are VM Motori built engines. Although Fiat now own VM, the A630HP was originally a General Motors designed engine which was never used by GM but sold off to FCA. VMs own engines are actually very reliable, they have been used by many manufacturers including Toyota, Kia, Hyundai, Rover, London taxis etc and their marine engines are good too. Shame this one is an absolute dudArent the Jeep engines essentially Fiat built truck engines? Think they are. I used to have a 2009 Jeep Cherokee ( Liberty) 2.7 CRD and it was like driving a taxi most of the time...but great off road though.
If you had a 2009 2.7 in your Jeep that would have been a Mercedes engine, which to be fair they should have stuck with, I have the same V6 Diesel in my E Class and its a cracking motor!