The Bugatti Veyron 16.4 SuperSport has the highest top speed. (268mph, 431kph)
A Bugatti Veron which has a top speed of 267 mph.
The SSC Ultimate Aero has a theoretical highest speed of 462 km/h (287 mph)
The fastest car is the Bloodhound SSC which can reach a top speed around 500mph. This car holds the land speed record. However, it is not road legal.
90 Km/Hr
There is no limit. Be careful not to overload your car's electrical system with too many big bulbs.
During races they reach a top speed of around 190 mph. Honda set the speed record at 257 mph in a fully legal car set up for speed on a straight road.
Formula 1 is the fastest on a closed course but illegal on road. Fastest legal road car is a Bugatti Veyron Super Sport. It has a TOP SPEED of 406km/h! Sorry James May. The world record holder is the SST and went faster than the speed of sound.
15 mph
The speed of light is faster than the highest speed of a car.
yes
Dearest?
It depends on the average speed which, in turn, depends on what the car is capable of, the speed limit(s), road conditions, traffic, stoppages. At 20 mph, the speed limit on my road, it would take 33.5 days! On a UK motorway, staying within the legal speed limit, just over 9.5 hours.