Ok, an actual video, although a short one, of the LX8, not much to see, but the engine sound was better than the LX6.
lx8.wmv
Another very short video of a real Caterham that eventually made 250hp, but was rev limited to 7200 rpm / 225hp in this video. The car is now in San Francisco. At least you'll get an idea of the sound of the real thing:
cat1.wmv
As mentioned, Caterham is now promoting a race series for the CSR 260, that includes the usage of slicks. Note that the engines are Ford Duratec 2.3 liter 4 cylinder engines. Cosworth does the mods, but I'm not sure where the mods are done for the UK cars. There's a Cosworth in Long Beach California that does the mods for the same Ford Duratec engines in Californnia, and possibly for most of the USA based Caterham CSR 260's.
There is a Caterham CSR 330 prototype, using a supercharged 2.3 liter Duratec:
Caterham x330
More realistic is the fact that the Champ Car Mazda Atlantic series is also based on the same Ford Duratec 2.3 liter (called Mazda MZR, but it's the same engine) modified by Cosworth in Long Beach, Califonia, but these engine produce 300hp (they don't have to last as long), and these could be used in racing Caterhams along with a stronger drive train. The Champ Atlantic cars have a top speed of 175mph (significant downforce, else top speed would be even higher). Think of these as the modern day equivalent of Indy Light race cars before IRL, and CART split up into two groups:
Champ Car Atlantic
Race 07 includes a CSR 200, CSR 260, and a CSR 320 (not quite the 330, but close). CSR 320 video:
r07obc3.wmv
Although 0 to 60mph is very fast and 0 to 100mph is also quick, the high drag factor of the Caterham body limits top speed of the CSR 260 to about 155mph. The CSR260 isn't cheap, it costs almost as much as a Corvette Z06, and the Z06 includes extras, like real doors, a roof, ...