and the Toyota GT-One and the subsequent demise of the class in other championships suddenly rendered the Speed 12 obsolete. In order that their work not go to waste, TVR immediately set about developing the road-going Speed 12, although the project would not be completed for another year. GT2 Completed in 2000, the car was now rechristened TVR Cerbera Speed 12; it never had a true measurement of engine power output officially taken, although the original engine (which produced 800 hp according to TVR) was employed yet again. The weight was kept down to 1,000 kilograms and TVR reminded people that they were making a car that they thought would beat the McLaren F1 with the words "over 240 miles per hour" mentioned on several occasions. The new car would also be built in parallel with a new race car, although TVR were forced to opt for GT2 class as the GT1 class had been dropped some years previous. The new race car managed to run for a few seasons in the British GT Championship and had some success, winning several races. It did however have problems with reliability, often leading to the car retiring from races. Meanwhile, the road car was almost ready and TVR had taken a good number of orders and deposits for it. With a price of £245,000 it would be the most expensive TVR in history. The racing version of the engine produced approximately with its power limited by the intake restrictors required by racing regulations. For the road-version of the engine, the restrictors were not needed so the engine was developed without them. In an interview then-owner Peter Wheeler, said that TVR had tried to record the car's power on an engine dyno. The dyno was rated at but the test resulted in its input shaft being broken. To get an approximate figure, TVR engineers tested each bank individually; the result was per bank, suggesting a total rating of . Wheeler, no newcomer to high performance cars and an experienced racer in the TVR Tuscan Challenge, drove one of the finished prototypes home and concluded that the car was unusable on the road, in his opinion simply too powerful. The deposits were returned when the production plans were cancelled. The remaining prototypes were carted around to various car shows. One by one they were dismantled and used as spares for the Speed 12 race