The rev counter isn't very accurate at all, especially at lower rpms. Log it with VAG-COM if you have it? Fire up a couple of Measuring blocks, including rpm, set it to write to a log and then go for a blat. When you get back, download the log and open it MS Excel. VAG-COM records the actual rpm from the crank sensor. The rev needle takes a signal from the ECU which then has to be driven mechanically, so there's an element of error involved. I personally wouldn't make a habit of revving to 7300rpm on a standard VR6. It's not making torque up there, so there's no point. With HD springs