I don’t know a ton about foreign motors other than surface level stuff like the 2JZ, Wankel, etc. so please forgive my ignorance outside of US motors.
However, in my eyes, it doesn’t get better than the simplicity and easily available power of the SBC, BBC, and 6BT. What are your all time favorites and why?
Gonna mention some great euro diesels:
Land Rover TD5
VAG 1.9 TDI
BMW M57
Mercedes OM606
Ford (Europe) 2.0 TDCi