Passing Prius drivers? Duuuuuude! You'll be passing a lot more than Priuses in a 4.8is.

Let me go over the official specs with you:

4.8 liter V8, 0-to-60 mph in 5.9 seconds, 355 horses. Very few SUVs will exceed that. Only the Cayenne Turbo and Mercedes ML63 AMG will out-pace it (and the Jeep modded with the SRT8). It's 0.5 seconds faster to 60 mph than even the NEW BMW 4.8i (E70). And it's faster than both the regular Cayenne and the Cayenne S.

As for Range Rovers (supercharged or not), if you want to spend as much time in the shop as you do on the road, you've got your vehicle. Pick up the annual Consumer Reports Car Issue if you want to marvel at the Range Rover's stellar reliability.......NOT.

You won't be setting new reliability records in a 4.8is either, but it's not any worse than Porsche.

Your best bet is to look for one with low mileage (less than 30,000 miles) and make sure it has a full service history. That history should be there, recorded on the chip inside the ignition key.