Direct injected precomputer. In order of most people’s preferences
12HT 6 cyl
13BT 4 cyl
1HZ non-turbo
3B non-turbo
I don’t know enough about this engine but it has the potential beyond them all 1HDT-FTE
1HDT-FTE = E stands for Electronic.
The problem with 12HT/13BT and 3B is that parts are much harder to find and a lot of them aren't available anymore. I just rebuilt my 13BT and hopefully I don't need any of those parts for a long time. Whereas the 1HZ, is still being made so you will be able to find parts for a looong time.
I'm looking for information on the newest or best diesel with no computer and am I to assume that if fuel injected, it has a computer? I am looking for a Diesel LC (preferably 4door but will also look at 2 door models) in the event of an emp attack, it will still run. I'd love to have something I can drive now but then pass down to my son to keep for just such an occasion.
WARNING> long post...
All toyota diesels are either Mechanically injected or Electronically injected.
So you have quite a few options in terms of 2/4 door and diesel...however you are importing one or buying one that has already been imported, or swapping an engine with the latter being the most labor intensive and possibly expensive.
these aren't all inclusive lists, but give you an idea of what to look at. Not too mention, Left hand drive is harder to find in most of these models. This is also assuming 25year and older for importing/buying.
40 series (I don't believe there were any factory turbo diesels, possibly in the Bandierte's from South america)
BJ40 = B/2B/3B 4 cylinder diesel, short wheel base 2 door hard/soft top
HJ40/43/43 H/2H 6 cylinder diesel, short/medium/long wheel base, pickup/troopy/soft/hard top
60 series land cruiser options (4 door)
BJ60 = 3B 4cyl diesel
HJ60 = 2H 6 cylinder diesel
HJ61 = 12H 6 cylinder direct injected turbo diesel
70 series (there are A TON of different options here)
BJ70 = 3B 4 cylinder diesel, short wheel base, 2 door, hard top or softtop
BJ71 = 13BT 4 cylinder turbo diesel short wheel base, 2 door, hard top or softtop
BJ73 = 3B 4 cylinder diesel, medium wheel base, 2 door, fiberglass FRP removable top or softtop
BJ74 = 13BT 4 cylinder turbo diesel, medium wheel base, 2 door, fiberglass FRP removable top or softtop
HZJ73 = 1HZ 6 cylinder diesel, medium wheel base, 2 door, fiberglass FRP removable top or softtop
BJ75 = 3B 4 cylinder diesel, "Troopy" long wheel base 2 door
BJ75 = 3B 4 cylinder diesel, Pickup, 2 door/bed
HZJ75 = 1HZ 6 cylinder diesel, "Toopy" long wheel base 2 door
HZJ75 = 1HZ 6 cylinder diesel, Pickup, 2 door/bed
HZJ77 = 1HZ 6 cylinder diesel, long wheel base 4 door
80 series: (much more electronics on this, but you can still find some bare bones models)
HDJ80/HDJ81 = 1HD-T 12v 6 cylinder turbo diesel, 4 door long wheel base.
HDJ80/HDJ81 = 1HD-FT 24V 6 cylinder turbo diesel, 4 door long wheel base.
HZJ80 - 1HZ 6 cylinder turbo diesel, long wheel base 4 door
Hope that helps, happy hunting!