http://www.hbci.com/~wenonah/new/tesla.htmon edit
The modified car was a Pierce Arrow, one of the luxury cars of the period. The engine had been removed, leaving the clutch, gearbox and transmission to the rear wheels undisturbed. The gasoline engine had been replaced with a round, completely enclosed electric motor of approximately 1 meter in length and 65 cm in diameter, with a cooling fan in front. Reputedly, it had no distributor. Tesla was not willing to say who had manufactured the engine. It was possibly one of the divisions of Westinghouse.
The "energy receiver" (gravitational energy converter) had been built by Nikola Tesla himself. The dimensions of the converter housing were approximately 60 X 25 X 15 cm. It was installed in front of the dashboard. Among other things, the converter contained 12 vacuum tubes, of which three were of the 70-L-7 type. A heavy antenna, approximately 1.8 meters long, came out of the converter. This antenna apparently had the same function as that on the Moray converter (see below). Furthermore, two thick rods protruded approximately 10 cm from the converter housing. Tesla pushed them in, saying "Now we have power." the motor achieved a maximum of 1,800 rpm. Tesla said it was fairly hot when operating, and therefore a cooling fan was required. For the rest, he said there was enough power in the converter to illuminate an entire house, besides running the car engine. The car was tested for a week, reaching a top speed of 90 miles per hour effortlessly. Its performance data were at least comparable to those of an automobile using gasoline. At a stop sign, a passerby remarked that there were no exhaust gases coming from the exhaust pipe. Petar answered "We have no motor."
The car was kept on a farm, perhaps 20 miles outside of Buffalo, not far from Niagara Falls.
A few months after this automobile test, and because of the economic crisis at the time, Pierce Arrow had to stop production. It is very likely that the interconnection between the electric motor and the transmission had been performed there. Pierce Arrow's tools were taken over by Studebaker, in South Bend. Not quite 30 years later, that company also vanished to form American Motors, jointly with Nash. Later, some of its fans attempted to resuscitate the Pierce Arrow. Unfortunately, they were not successful.
You can read more about Tesla from this link:
http://www.physicsforums.com/showthread.php?t=12430I used to have the website where the news articles that had photos of the car and the name of the reporters who rode in the car, but alas, my old HD went down and although some 85% of my HD was saved, the Tesla stuff wasn't. (Conspiracy or simple accident - you decide!)