06. Porsche 9ff GT9-R – Top Speed 254 mph/ 409 kmh
The 9ff GT9 is a sports car based loosely on the Porsche 911, built by German tuning company 9ff, founded by Jan Fatthauer. Based on the Porsche 911 (997) GT3; the cars are extensively rebuilt and fitted with a heavily modified 4.0 litre flat 6 that produces 738 to 1,120 bhp (550 to 835 kW; 748 to 1,136 PS), depending on the configuration.[One of the major differences from a normal 911 is the positioning of the engine; whilst every 911 throughout Porsche’s history (excluding the Porsche 911 GT1 racer) has been rear-engined, the GT9 is mid-engined for better weight distribution.
It takes the 9ff 3.8 seconds (from a rolling start) or 5.2 seconds (from a standing start) to reach 100 km/h (62 mph), and 17.6 seconds to reach 300 km/h (190 mph). The top speed of the original GT9 is 409 km/h (254 mph).This was faster than the original Bugatti Veyron, but slower than both the SSC Ultimate Aero TT and the Bugatti Veyron SuperSport.
05. SSC Ultimate Aero – Top Speed 256 mph/ 412 kmh
The SSC Ultimate Aero is a mid-engined sports car that was produced by SSC North America (formerly known as Shelby SuperCars) from 2006 until 2013. The SSC Ultimate Aero held the title of the fastest production car in the world, according to the Guinness World Records, from 2007 (when it was officially timed at 256.14 mph (412.22 km/h)) until the introduction of the Bugatti Veyron Super Sport in 2010. However, in April 2013, the Guinness World Records temporarily disqualified the Veyron’s record time for a period of five days, due to concerns about electronic speed limiting changing the function of the car, thereby reinstating the Ultimate Aero as the fastest production car in the interim.
The SSC Ultimate Aero was not sold with electronic driver aids such as antilock brakes or traction control, as according to Jerod Shelby, “Early design philosophy on the car was to make it a driver’s car. I wanted a car that you not only throttled with your right foot but at times you could steer with your right foot and a sensor ”