That makes sense as below 2mph the DR system doesn't operate. The effect is as if there is no anti roll bar joining left and right suspension giving true independant front and rear suspension and consequently more contact with the ground in extreme articulation situations.

Is DR standard on TDV8s or an option?

I believe it is standard on the TDV8, well it is here in upside down land.

Back to my first question : with DR, is the vehicle less comfortable for passenger, especially in the back ?

The main advantage of having DR from a passenger's point of view is that the car will roll less (corner flatter) than a car without it so there is less likelihood of getting travel sick if the person is susceptible in that way.

Thanks.
Will it also get stiffer on rough roads ? Northern France and Belgian motor/highways are horrendous.
I'm aware you cannot have best of both worlds and am still wondering if a car that drives more in line
will also be harder to the misses bum.

I hope this will help you understand...

Quote:

The Dynamic Response system provides improved vehicle handling and ride characteristics and is active for both on and off-road driving.

The Dynamic Response system uses two accelerometers to detect vehicle cornering forces and inputs from the steering angle sensor to supply data to a dynamic response control module. The control module then operates solenoid valves in a valve block which apply hydraulic pressure to actuators fitted to the front and rear stabilizer bars. The application of hydraulic pressure to the actuators applies a specified amount of torque to the stabilizer bars to counteract the cornering forces and minimize vehicle body roll.

The Dynamic Response system is electrically and hydraulically operated. Electrical and hydraulic operation is controlled by the Dynamic Response control module which is located on the driver's side 'A' pillar, behind the instrument panel.

The Dynamic Response system comprises front and rear stabilizer bars with integral actuators, two accelerometers, a control module, a hydraulic pump, a valve block and a fluid reservoir.

The Dynamic Response system prevents body roll with cornering forces of up to 0.4 g. From 0.4 g there is a progressive increase in body roll but significantly lower than on a 'passive' system. A 'passive' system will have a progressive increase in body roll angle as soon as cornering forces are applied and will have a greater roll angle than the Dynamic Response system for the same cornering force.

The Dynamic Response system can also detect when the vehicle is driven off-road. If off-road conditions are detected and the vehicle is traveling at 25 mph (40 km/h) or less, the control module will reduce roll compensation. On side slopes of more than 11 degrees the Dynamic Response system will switch to a 'locked bars' condition at slow speed.

Lateral acceleration of the body is sensed by two accelerometers and signals from these are transmitted to the control module. The engine driven hydraulic pump supplies a constant hydraulic flow to the valve block. Two directional control valves are solenoid operated by the control module and supply hydraulic pressure to the applicable side of each actuator to apply a force equal to and opposite to the force applied to the stabilizer bar. In operation the Dynamic Response system maintains the attitude of the vehicle body when cornering.

DR has nothing to do with the air springs or dampers. Its all to do with the front and rear stabilizer bars, so it does not affect the stiffness of the ride. It just controls the body roll.

Comfort, whether in front or at the back, is very subjective and up to the individual. I don't know if your current vehicle has DR but I would suggest you drive both types to make a personal decision.  Malaysia Boleh!
4.2SC Chawton White, Stormers
Tasmod's Sills, Wind Deflectors, LR Sills
Clear Side Repeaters, Towbar
Larini Sports Exhaust, K&N Air Filter
______________________________
WINNER - 2008 'Tech-Head Of The Year' Award
WINNER - 2009 Outstanding Contribution
WINNER - 2009 'Tech-Head Of The Year' Award

Nice post, Bobby.
Well, I'm tempted to pick up the option after all, even if I cannot seem to find a dealer
who runs DR vehicles for test drives.
By the way, I have no current vehicle : still driving an XJ8.
The RRS will be here next June.

to reiterate

simply the BEST feature of the car.. also happens to be the BEST feature on the X5 (I forget what they call it but same concept i.e. hydraulic system to act against the torsion (anti-roll) bar on the front of the car), so not sure how or if it could make the whole suspension stiffer i.e. bumps in the road?

I would not have the vehicle if it didn't have this feature, simply because it makes it so much more fun (x 100) to drive by minimising (almost eliminating) roll/pitch into corners at speed

SO GOOD!!!!!

rrsboy wrote:

I would not have the vehicle if it didn't have this feature, simply because it makes it so much more fun (x 100) to drive by minimising (almost eliminating) roll/pitch into corners at speed

SO GOOD!!!!!

To reiterate : I don't speed, I cruise.
Too many radars in France to speed nowadays.

quantz wrote:

Nice post, Bobby.
Well, I'm tempted to pick up the option after all, even if I cannot seem to find a dealer
who runs DR vehicles for test drives.
By the way, I have no current vehicle : still driving an XJ8.
The RRS will be here next June.

Bigby : My, you're absolutely right and made my day.
I almost were to pay option for standard…

Seller tells me it's not standard…

quantz wrote:

Seller tells me it's not standard…

If he sticks with that position,tell him you want the HSE std spec car as advertised by LR.

If he refuses, report him to trading standards.

Perhaps the dealer is confused (perhaps he is talking about Terrain Response with Dynamic Mode. However this would seem odd as this is not an available option for the TDV6 HSE or SE).

Have fun !  2010MY HSE 3.0 TDV6. Stornoway Grey/Ivory. Extended leather, winter pack.

Apparently, standard in the UK, not outside (says LR document I have here).