Two prototypes of the 1984 Countach Turbo S were built by Lamborghini, of which one is known to exist. The Turbo S weighed 1,515 kg (3,340 lb), while its 4.8 liter twin-turbo V12 had a power output of 758 PS (558 kW) and a torque output of 876 N·m (646 lb·ft), giving the car an acceleration of 0-100 km/h in 3.7 seconds and a top speed of 333 km/h (207 mph). A turbo adjuster, located beneath the steering wheel, could be used to adjust the boost pressure from 0.7 bar to 1.5 bar at which the engine performed its maximum power output. The Turbo S has 15" wheels with 255/45 tyres on the front and 345/35 on the rear.[10] https://en.wikipedia.org/wiki/Lamborghini_Countach#Countach_LP_Turbo_S