It depends a bit on what you think of as a car.
The fastest "production" car in the world is the Bugatti Veyron and costs $1,700,000. It has 1001 hp, it's top speed is 414 km/h [ 252 mph] and it is made in France.
The worlds fastest road legal non production car is the red Victor 1 made by an Englishman. It has 2002 hp double the Bugatti Veyron.
Top Fuel dragsters can do 330+ mph / 530 km/h.
In terms of jet engine powered the thrust ssc has an speed of 1276 km/h, faster than the speed of sound. It was driven by pilot Andy Green. It was powered by two phantom fighter jet engines.
It is called the 'Thrust SSC'. It set the world record at 763Mph. It can go this fast because its got a jet-engines on both sides. There is a new project trying to beat this speed and go a step further to 1000Mph. That project is called 'Bloodhound SSC'
The fastest street legal car in the world was the Bugatti Veyron 16.4 Pur Sang Edition. Its top speed is 252.75 mph. It does 0-60 in 2.6 sec.
After that, it was the SSC Ultimate Aero. Top speed: 257 mph; 0-60: 2.7 sec
As of June 26, 2010...the Bugatti Veyron Super Sport
reclaimed the record at 267.81 mph.
The fastest car ever made is the 750 MPH British Thrust SSC.
Its the 2009 Ultimate Aero TT is capable of a top speed of over 270 mph built by Shelby Racing.
1937 - Mercedes-Benz W125 - 268.3mph on the german autobahn. Still has the world record for top speed on a public road
1938 - auto union streamliner - 432km/h (268mph)
2012 - bugatti veyron SS -431.072 km/h (267.856 mph)
2011- SSC aero - 256mph, on a highway in washington state. ran out of road, wind tunnel testing says it should go 440km/h (273mph)
2012 - Koenigsegg Agera R- manufacturer claims 442km/h(275mph) not yet proven
2012 - Barabus TKR manufacturer claims 270mph top speed
2012 9ff gt-9r manufacturer claims (414km/h 257mph)
The fastest ever car recorded (2007) gueness world records was the buggatti vyron it has a v8 twin engine.
Fastest Car: Bloodhound SSC (SuperSonicCars) is capable of a speed of 1000+ mph. Powered by 2 Rolls Royce Phantom jet engines no car can beat this astonishing beast. This car goes so fast that when the brakes are pushed when the cars is going at top speed the driver's blood in the brain goes to the feet.
Fastest Road Legal Car: Bugatti Veyron Super Sport
(Bugatti Automobiles S.A.S) is capable of a top speed of 431
km/h or 267 mph. Powered by 2 Volkswagen 8.2 V8 engines bolted
together to make a 16.4 W16 that produces over 1,200 BHP. This car
is so fast that if the car didn't have its vertical air brake and
aerodynamic mirrors, it would take off.
The fastest commercially available car is the Hennessey Venom GT. It has a top speed of 270.49 mph.
The Mclaren F1 is the fastest road-legal car but the fastest land vehicle is the Thrust SSC ( faster than speed of sound)
koenigsegg agera r