Smokey88

One thing to bear in mind is the condition of the engine concerned. A worn out old oil burner will be performing way below optimum which will be reflected in its economy, whereas a fully rebuilt one should should a big improvement over those figures. I dropped a Rover SD1 3.5 V8 into a 110 a long time ago without doing anything to it - it only just nudged 12mpg when I drove it like a vicar, otherwise it'd be well into single figures. I've heard of 2.25 diesels only returning 22mpg, but also rebuilt 2.25Ds doing over 30mpg. What I'm trying to say is that you should use this figures quoted in these replies as ballpark figures - you almost certainly will get something different due to the different wear in the engine, different gearing, and of course driving style & geographical influences. Whatever you chose, I'd recommend you at least hone and re-ring, renew the valve seats and guides, and replace the big end bearings - at least the engine will be in a reasonable condition after this.

Sorry Rob - I completely misread your post - doh!

My old 90TD could cruise at 75mph and had nosed 90 going downhill - but that was both scary and noisy That was on 265 BFGs mind you.

What are you planning on doing with the Landy once you've dropped this in? Some of it seems unnecessary - heres what I did with my last redblock'd 940 Classic: 531 head with turbo valves A cam 15G @ 13psi (norm) and 15psi (RR) 2.5in custom stainless exhaust Group A cat Freds chips fully synth oil & tranny fluid (Amsoil) K&N air filter in std airbox I got a RR result of just over 220bhp with that. Thats without a rebore on a 95k mile otherwise standard engine using Shell Vpower. With the work you're planning, I reckon you're going to be giving it some serious welly - and I think the gearbox is going to strip a lot of gears - assuming the halfshafts don't pop first

I have some 24V gauge segments knocking about somewhere if you need them. Fuel, coolant temp and maybe oil temp IIRC.

As has been previously stated, mechanical sympathy is the key - if you drop the clutch at 4000rpm something is going to give. If you're lucky it'll be a halfshaft, if not...?! I can't see why a B230 would cause difficulty in a landy - in fact its something I considered a while ago (I am a Volvophile having had 8 to date, mainly redblocks. My current daily driver is an 850R I'd start with a B230FK given the choice - you can always up the boost if required. Remember its identical to the B230FT mechanically - its just the turbo actuator and the ECU that is different. The B230FK has a more torquey set of maps so although the headline figure is only 135bhp, it drives like a decent 2.5. But you probably know this so I'll shut up Let us know how you get on!