Aston Martin's One-77 test car was spotted on the Nürburgring, Nordschleife this week. It’s believed the One-77 is undergoing final testing before its launch. Aston Martin's new sports car is powered by a 7.3l V12 engine capable of producing 522kW. The V12 powerplant is capable of rocketing the One-77 from 0-100km/h in 3.3 seconds topping out at top speed of 350km/h. A prototype model has been reportedly clocked at 355km/h.Only 77 units of the Aston Martin One-77 will be assembled.