There is a plethora of HPI RS4 videos on YouTube that span not only racing, but endurance and speed testing as well. However, videos can also found on various RC racing enthusiasts websites.
1/18th
It stands for "Renn Sport", which translates in English to "Racing Sport."
They certainly do, you just need to find a dealership that took a RS4 as a trade in and there you go! A used RS4. If you are lucky the previous owners will have left CDs, sandwiches, mats and even furry dices on the rear view mirror.
The RS4 is produced by Audi.
420hp
On paper the 135i will be faster, due to a better power to weight ratio than the RS4. Equally at higher altitudes the 135i will benefit from it's forced induction system over the RS4's naturally aspirated V8. On pull off, when launched correctly the RS4 should fair better, largely on account of its all wheel drive system.
audi rs4
12,000
Audi no longer manufactures the B7 model RS4 sedans and avant models, and has replaced these with the S5, RS5 and S4. Audi USA have recently announced plans for a new RS4 avant station wagon, however it is not yet clear whether this will be manufactured or sold in other countries.
No it is a sports sedan, with luxury trims fitted as standard. The RS4 has a 4.2 Liter V8 engine, Audi's all wheel drive Quattro system and sports suspension.
Audi RS4 & Bentley Continental Gt.
The Kelli Blue Book price on a 2008 Audi RS4 is 45200. That can vary depending on mileage and condition of the specific vehicle. The selling price would of course be greater.