RizRegarding the actual speed limit of 155 mph on RS 4 vehicles, we are planning to rise the limit up to 174 mph (280km/h). This modification will only be done upon special request and can be ordered as an option with the new vehicle. The upcharge has not been specified yet but is expected to be around EURO 2.000.
Testing of modified vehicles in view of tyre specification, drive train, engine software etc. is in progress and will be finalised by the end of May 2006. Due to the actual schedule, the option is supposed to be released in calendar week 22 to 24.
We are sorry that we cannot provide the 174 speed limit at the the time your vehicle will be produced. Nevertheless, retrofitting of the option will be possible. A retrofit kit will be available through your dealer/importer or directly from quattro GmbH.
Please do not hesitate to contact me again if you should have any further questions.
