Suspension problem I was driving my lr3 down the road and the terrain selection came on and said terrain selection off. and also now it says suspension problem too. I can't change the hieght of the rover either, theres no compression in the tanks, well i dont hear it filling up anymore.

Is it a TDV6 and do you have suspension warnings too?

Clearance, mostly its just for looks unless you like to go off roading

New cars have rubber sunspension bushes that absorbe a lot of road noise. Check to see if someone hasn't replaced the suspension points with neoprene bushing. This is a hard plastic that will not absorb the road noise. The other part of your problem will be the tread pattern of the tyres as they are designed for off road use but will howl on sealed surfaces. Experiment with tyre pressures as a few pound up or down may make a difference. Talk to a tyre dealer for advice on this

It is quite a RUGGED and STRONG MUV and can be also termed as a SUV. It has four wheel drive and a robust suspension with a good reputation of being a workhorse.
So if your requirement is for multiutility with rough terrains this has good ground clearence that can be helpful in difficult road conditions.

any bonnet light come on? Youll need to have the potentio meter at each axle inspected for disconnection

Leaky shock absorber

there is a problem with the rear differential motor actuator,the clutch seems to retract half way back during ingnition cycle procedure...it would require recalibration for simpler cases and a motor actuator  replacement for the more serious cases...has d handler to recalibrate transfer case too.use approved diagnostic equipment e.g. JLR IDS

I used to a own jeep grand cherokee but sold it for an LR3. From experience the jeep is somewhat economical over the lr3 in term mpg. Seating in the jeep is a joke, not enough leg room or head room or comfort from daily driving for 3 years. Most of the jeep dashboard is plastic which is essentially price reducing overall to the cost of the car. In terms of the LR3, you have lots of driver and passenger comfort, more suspension features, more capability, however, buttons for certain things are hard to find and need time to remember. Next, LR3's tires need to be replaced once every year, at least since i off-road 4times a month, not much but yea.

Overall the jeep is cheaper and more economical to drive with less comfort. The LR3 is the exact opposite, its more comfortable, more capable on/off road, more better looking, however, it consumes lots and lots of fuel, maintenance can be lot at 30 or 60k. let me put it this way, a jeep grand cherokee is like a bicycle and an LR3 is like a sports bike.

This new five-passenger premium sport-utility vehicle filled a price gap between Land Rover's LR3 and its ultraluxury Range Rover models. In fact, the all-wheel-drive Range Rover Sport was smaller than either, designed to compete with "high-performance" SUVs such as V8 versions of the BMW X5 and Porsche Cayenne, as well as Cadillac's SRX. Based on the seven-passenger LR3's body-on-frame structure, the Range Rover Sport came as the HSE model with a 300-horsepower, 4.4-liter V8, and in Supercharged trim with a 390-horsepower, 4.2-liter V8. Both engines were sourced from Jaguar, which was owned by Land Rover's parent company, Ford. A six-speed automatic with manual shift gate was the sole transmission. All-wheel drive with low-range gearing was standard, and included Land Rover's Terrain Response system, designed to automatically tailor AWD performance to specific off-road conditions. Also included were a height-adjustable air suspension, antiskid/traction control, and antilock four-wheel disc brakes. The Supercharged model came with 20-inch wheels and Brembo-brand front brakes. On the HSE, 19-inch tires were standard and 20-inch optional. Both models contained front side airbags, head-protecting curtain side airbags, and a navigation system. Standard on the Supercharged model and available for the HSE were wood interior trim, heated seats, and Land Rover's Dynamic Response suspension system, designed to counteract body lean in turns. Satellite radio, wireless cell phone link capability, and rear DVD entertainment were options. Adaptive cruise control was available for the Supercharged edition.

I can speak from experience on tires for LR3 and Sport. I used to be a big Nitto advocate but found Cooper Zeon LTZ all terrains. What I found was a softer compound which was quieter on the road, stickier on the loose and wet stuff [what really matters, otherwise why else choose a non-factory tread?]. They performed supremely on our Great Divide II trip where the terrain changed as quickly as the weather. I drive nothing other than them from an honest user point of view.
Here are some pics on the sport. Others will post for LR3 for you [I've asked them to chime in].