The Nissan's red area starts at 6900 the limiter (which is a soft one) starts winding the fuel delivery back as you approach 7300. It won't go past 7600 at all (being auto you can't even shove it down a couple of gears - it won't go down the box until safe to do so). Peak power was about 6850, so well done Nissan, got things in the right order.
The hard limiters that work by inhibiting the ingition sparks are very harsh devices. As well as the 'bouncing' effect, you also end up chucking unburnt fuel /air mixture through the cat. This is bloody dangerous as when a slug of hot gas does go through pipe it can ignite the whole lot.
A friend of mine managed to blow the seam welds on the exhaust box in this way!!.
The Pug 406 is redlined at 5300, which is high for a diesel, even a 16 valve one (which it is). Peak power is about 1000rpm lower so it's totally pointless going that far unless you really do like soot.