What makes a Disco a good off-road vehicle?
Drifting
Joined: Oct 2020
Posts: 37
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From: Long Beach, CA
They're heavily depreciated. Let's face it. That makes all the difference. Not many people radically offroad the new ones, nor would they have done so to the D1 when it was brand new and cost the equivalent of today's $70,000.
We can count the Discovery 1's virtues, but it has to be in the context of the depreciated sale value and the expense typically necessary to get them to function as expected. A $4000 Discovery 1 with no further expenditure is going to come up grossly short in many ways. It just won't likely make it long without truly needing additional spending. On the other hand, a Disco with the issues sorted and good components that have been proven for at least a few years of regular offroad use could be compared to other on-highway vehicles as well as offroad side-by-sides in a similar price range.
Every vehicle is a set of trade-offs, and the Discovery 1 is not just a bunch of trade-offs that favor offroad use. In many ways, it compromises substantially and we can say that it's not that good offroad -- compared to something more dedicated. The most obvious issue is its heavy weight. Obviously, it's not as massive as a full-size truck, but there are a lot of much lighter alternatives and the advantage of this offroad is undeniable. While the aluminum outer skins and aluminum block and heads lower the weight in relation to what it would be with only steel and iron, it is still not lightweight nor is it remarkably lighter than many capable alternatives.
The front radius arm suspension is another trade-off. It's more stable at speed both on the highway and offroad, but it will not articulate as much as a 3 or 4-link and it tends to unload when going up obstacles. It's a compromise somewhere between links and IFS.
The coil spring suspension is another compromise. It's clearly more capable than a leaf-spring suspension at allowing lower spring rates that flex better while still positively positioning the axles. Leafers usually need excess stiffness in the springs to locate the axles and control axle wrap. On the other hand, the Discovery does not go as far as offering coil-over suspension that would allow a much greater range of tuning for offroad. There is really no serious offroad vehicle that doesn't (notwithstanding alternatives like airshocks, struts, bypass and so on). Perhaps even more detrimental to the Discovery's offroad performance is the characteristic roll-center. This is one area where the side-by-sides or Ford Raptor-style trucks have a clear advantage in some situations, and hardcore rock crawlers have an advantage in others.
Even so, there was no production on-highway vehicle with coilovers and a extreme roll center positions being made 25 years ago, and the more recent offerings are either much costlier than a depreciated Disco or they lack other features like glass windows and AC.
Ultimately, we have to see the Discovery as a package. It has a lot of good offroad features, but it also comes with things that don't help and could even hurt its offroad abilities but which still make it attractive in other ways. It has a roof to keep the sun off, windows that roll up and air conditioning. Most of them in the NA market have front airbags, a crash-test proven dash, and reasonably good protection in rollovers even without a roll cage added on. It's freeway capable and quiet enough inside at speed to hold a normal conversation.
I won't repeat all the other great information in this thread that explain some of its virtues, but I will add one I'm not sure has been emphasized enough. If fit 85 profile tires on mine, 255/85R16's. While this isn't remarkable for some other vehicles out there like Jeep Wranglers and some pickup trucks, all the late-model Land Rovers and many other contemporary SUV's use low-profile tires. For that matter, even the side-by-sides tend to use tires incapable of forming a long contact patch when aired-down. No amount of eletronic wizardry can give you more traction than the tires have available. The kind of tires that can be fitted to an early Discovery make generous traction available even with relatively crude mechanical traction control (diff locks, limited slips, or even open differentials). That combined with simplicity and ruggedness of the solid axles (of which the Land Rover has a good design) and a comparatively flexible suspension, give the Discovery 1 outstanding offroad ability that is generally assisted by its other design features while still providing a lot of the creature comforts that people expect from their on-road vehicles.
We can count the Discovery 1's virtues, but it has to be in the context of the depreciated sale value and the expense typically necessary to get them to function as expected. A $4000 Discovery 1 with no further expenditure is going to come up grossly short in many ways. It just won't likely make it long without truly needing additional spending. On the other hand, a Disco with the issues sorted and good components that have been proven for at least a few years of regular offroad use could be compared to other on-highway vehicles as well as offroad side-by-sides in a similar price range.
Every vehicle is a set of trade-offs, and the Discovery 1 is not just a bunch of trade-offs that favor offroad use. In many ways, it compromises substantially and we can say that it's not that good offroad -- compared to something more dedicated. The most obvious issue is its heavy weight. Obviously, it's not as massive as a full-size truck, but there are a lot of much lighter alternatives and the advantage of this offroad is undeniable. While the aluminum outer skins and aluminum block and heads lower the weight in relation to what it would be with only steel and iron, it is still not lightweight nor is it remarkably lighter than many capable alternatives.
The front radius arm suspension is another trade-off. It's more stable at speed both on the highway and offroad, but it will not articulate as much as a 3 or 4-link and it tends to unload when going up obstacles. It's a compromise somewhere between links and IFS.
The coil spring suspension is another compromise. It's clearly more capable than a leaf-spring suspension at allowing lower spring rates that flex better while still positively positioning the axles. Leafers usually need excess stiffness in the springs to locate the axles and control axle wrap. On the other hand, the Discovery does not go as far as offering coil-over suspension that would allow a much greater range of tuning for offroad. There is really no serious offroad vehicle that doesn't (notwithstanding alternatives like airshocks, struts, bypass and so on). Perhaps even more detrimental to the Discovery's offroad performance is the characteristic roll-center. This is one area where the side-by-sides or Ford Raptor-style trucks have a clear advantage in some situations, and hardcore rock crawlers have an advantage in others.
Even so, there was no production on-highway vehicle with coilovers and a extreme roll center positions being made 25 years ago, and the more recent offerings are either much costlier than a depreciated Disco or they lack other features like glass windows and AC.
Ultimately, we have to see the Discovery as a package. It has a lot of good offroad features, but it also comes with things that don't help and could even hurt its offroad abilities but which still make it attractive in other ways. It has a roof to keep the sun off, windows that roll up and air conditioning. Most of them in the NA market have front airbags, a crash-test proven dash, and reasonably good protection in rollovers even without a roll cage added on. It's freeway capable and quiet enough inside at speed to hold a normal conversation.
I won't repeat all the other great information in this thread that explain some of its virtues, but I will add one I'm not sure has been emphasized enough. If fit 85 profile tires on mine, 255/85R16's. While this isn't remarkable for some other vehicles out there like Jeep Wranglers and some pickup trucks, all the late-model Land Rovers and many other contemporary SUV's use low-profile tires. For that matter, even the side-by-sides tend to use tires incapable of forming a long contact patch when aired-down. No amount of eletronic wizardry can give you more traction than the tires have available. The kind of tires that can be fitted to an early Discovery make generous traction available even with relatively crude mechanical traction control (diff locks, limited slips, or even open differentials). That combined with simplicity and ruggedness of the solid axles (of which the Land Rover has a good design) and a comparatively flexible suspension, give the Discovery 1 outstanding offroad ability that is generally assisted by its other design features while still providing a lot of the creature comforts that people expect from their on-road vehicles.
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