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?
Rover K series, super lightweight and can produce very large power numbers. Jaguar AJV8 engines, very reliable, super smooth and make good power. Lexus V8’s are also similar, make great power and are super reliable and super smooth.