Which is faster a car or a motocycle?

Depends on the car and motorcycle. Often though, a motorcycle will have better acceleration and a car higher top speed.

Also, an automobile will tend to have far better cornering speed and traction, simply due to the greater amount of tire surface in contact with the road. But it all depends - a well tuned racing bike with special tires is probably faster and quicker all around than a 1962 Corvair.