the engine would be a 4.2 with 302bhp, it a german v8 amg, rover out zee germans in 
engine V8
valvetrain SOHC 3 Val / Cyl.
displacement 4266 cc / 260.3 cu in
bore 89.9 mm / 3.54 in
stroke 84.0 mm / 3.31 in
compression 11.0:1
power 225.2 kw / 302.0 bhp @ 5850 rpm
hp per litre 70.79 bhp per litre
bhp/weight
torque 409.5 nm / 302.0 ft lbs @ 5000 rpm
redline 6000
not sure what the limits of the box is.
engine V8
valvetrain SOHC 3 Val / Cyl.
displacement 4266 cc / 260.3 cu in
bore 89.9 mm / 3.54 in
stroke 84.0 mm / 3.31 in
compression 11.0:1
power 225.2 kw / 302.0 bhp @ 5850 rpm
hp per litre 70.79 bhp per litre
bhp/weight
torque 409.5 nm / 302.0 ft lbs @ 5000 rpm
redline 6000
not sure what the limits of the box is.
300bhp/ton
Well-Known Member
K&N are crap filters though...
300bhp/ton
Well-Known Member
Sorry but thats total bollox.
1. The R380 is rated at 380nm, so that's about 280lb ft for starters
2. The R380 is just a slightly overhauled LT-77, which has a 77mm layshaft
3. The LT-85 amazingly has an 85mm one and is stronger
4. Why do you think LR put the LT-85 in V8 powered 90's and the LT-77 in the lesser powered 2.5TD's
Because the former is the stronger heavier duty box
300bhp/ton
Well-Known Member
How do you plan to hook it up. Do you know of someone who does a bellhousing to couple it to a Rover box or are you planning on full custom jobbie or a different box?Hello,
I have a 110 defender with a 3.5v8 and lt85 box, i have seen a nice 4.2v8 pumping out 306bhp which i must have, but will my beast take it
The LT230 transfer box would likely handle it. But I think it'd eventually make mincemeat of the gearbox, but its not out of the question of using the LT-85.
Do Merc use this engine in the G-Wagen? If so it might be worth looking at pilfering some transmission bits from them.
Other issues will be axles..... the chocolate Rover ones probably won't last all that long. So budget for some upgrades or replacements. I'd also want something a little more substantial than solid front discs and rear drums to stop me too.
In short YES
It's all possible. But suspect you'll have to do some research and custom fab work. So time + money are your limiting factors.
'91 Defender
New Member
They're the same gearbox in TVR's i believe, so don't see why not
300bhp/ton
Well-Known Member
No they aren't. Early Chim/Griff (and Wedgies) used the LT-77. But since TVR lied about most of their HP claims the boxes where generally fine. And besides there is quite a difference in running a 1000kg 2wd sports car on 23" tyres and a 2 tonne+ AWD Land Rover on much bigger heavier wheels.They're the same gearbox in TVR's i believe, so don't see why not
Latter Chims/Griffs and newer TVR's all use the Tremac T5 gearbox which has 100% nothing to do with anything Rover.
Tazz070299
New Member
I'd want much better brakes and suspension set up before I thought of having that much power available in a Landy.
tazz
tazz
jamesmartin
Well-Known Member
lt77 and r380 share same brgs till k suffix and then only front cp shaft and rear layshaft have bigger brgs and the 77 refers to distance between between center of lay shaft and mainshaft as is lt85 and lt95 and series 3/2 which are 76 mm between centers,v8 lt77s where avaiable on rr and defender and discoSorry but thats total bollox.
1. The R380 is rated at 380nm, so that's about 280lb ft for starters
2. The R380 is just a slightly overhauled LT-77, which has a 77mm layshaft
3. The LT-85 amazingly has an 85mm one and is stronger
4. Why do you think LR put the LT-85 in V8 powered 90's and the LT-77 in the lesser powered 2.5TD's
Last edited:
jarviea10
Member
Sorry but thats total bollox.
1. The R380 is rated at 380nm, so that's about 280lb ft for starters
2. The R380 is just a slightly overhauled LT-77, which has a 77mm layshaft
3. The LT-85 amazingly has an 85mm one and is stronger
4. Why do you think LR put the LT-85 in V8 powered 90's and the LT-77 in the lesser powered 2.5TD's
Soz.....
jamesmartin
Well-Known Member
why sorry you got 1 wrong he got 3 wrong
300bhp/ton
Well-Known Member
Ta
True, but according to LR (info dotted about the internet) the Range Rover (and Disco) used the LT-77 with the V8 as the expected use was likely to be less than that of your average Defender. In terms of towing and hauling. Maybe this was misguided, but I've read it a number of times.
As for the latter V8 Defenders. I think they actually used the LT-77-S and there is a good case to claim they didn't use the LT-85 because it was no longer a production transmission at that time and was far more clunky and tractor like to use.
When I spoke to Ashcroft a couple of years back about a potential project involving a Jag V8 they advised the LT-85 would be the stronger box to use, although less pleasant to use.
300bhp/ton
Well-Known Member
Yes, but I got some fairly low level specifics wrong. They got some major info wrong which has a huge bearing on a yay or nay answer.
jamesmartin
Well-Known Member
was only been pedantic, the defination of stronger box depends on its use ie high speed or low speed ,
jarviea10
Member
He only got a few nigly points wrong, I made a monumental cock up!
