Cars that once held speed records weren't usually great at the track. However, the Ruf CTR "Yellowbird" begs to differ. Apart from being hailed as the fastest production car of its time, it was also an unofficial lap record holder at the Nurburgring, adding even greater value beyond its rarity.
The Ruf CTR Yellowbird was introduced in 1987 and was based on a Porsche 911 Carrera 3.2. The introduction of aluminum parts allowed Ruf to drop the weight of the CTR even further, and the engine modifications increased the total displacement from 3.2 to 3.4 liters. The engine had twin turbochargers and twin intercoolers, bringing the total output to 463 horsepower and 408 pound-feet of torque.