The long lived Range Rover P38 benefits greatly from a Synergy 4 (vp) as this owner commented:
"Hiya Ron got my box 02/02 fitted it 03/02 I've furred a few so called " super chip" boxs in my time and they are shall we say ok, put your module on my 97 p38 all I can say is holy sh*t, didn't realise my brakes were that bad. A million thanks to you and will be telling every one to fit a "Ronbox".
Some P38s suffer from difficult hot starting due to injection pump wear. Our new Synergy 4 HSF uses hardware & software modifictions to increase the fuelling for 20seconds after the ignition is turned on to enable hot starting easier. NB it is not a cure for a worn pump, its just a starting aid.
We recommend the optional square pushbutton switch for the Synergy 4 if towing as the eco mode can be used most of the time and the button pressed for extra torque.
The later Range Rover TD6 (BMW straight 6 engine) can be transformed by a Synergy 2 which plugs into the fuel rail & maf sensor or a Synergy 3 if your maf sensor has been replaced recently.
The 2.2, 2.7 & 3L V6 Range Rovers INCLUDING the Evoque go very well with a Synergy 3 which is easy to fit. (not Ingenium engine models)
The Synergy 2 and 3 can use the optional 3 position switch to give eco, off and sport settings while driving.