German Tuner Ruf has been modifying Porsches for years, and the CTR3 (it debuted in 2007) is the third iteration of it acclaimed CTR-series car, the first of which was known as "Yellowbird." This Ruf has a wicked bite thanks to its massively massaged 3.8L Porsche flat six, with supercar 0 to 62 mph time of just 3.2 sec. The CTR3 blasts on to a hair-raising top speed of 235 mph, which places it very high up the terminal velocity food chain.