L300 is a very old model, even back in 1997. It is very prone to overheating, often has aircon problems, is very unsafe in a crash due to the lack of a hood... The list goes on.
4JA1 > 4D56 in many ways, being sturdier and more fuel efficient. Though it is somewhat noisier and smokier (depending on maintenance).
Perhaps the Adventure diesel would be a more worthy competitor.