The first car was invented in 1885 by German Karl Benz.

Some say that the car was made to keep the roads clean from horse poo

• Originally cars were quite slow but with time they got a lot faster.

X ray of car

4 stroke engine

• this is the engine of a normal car.

• These are the stages• 1 petrol enters motor.• 2 engine creates spark.• 3 releases energy through petrol combustion.• 4 pushes waste out exhaust pipe.

Bourke engine

• DOHC or Twin Cam engine• • 4-cylinder 16-valve DOHC engine

• DOHC means Double OverHead Cam, or sometimes it could be called "Twin Cam". A DOHC setup is used in most of newer cars. Since it's possible to install multiple valves per cylinder and place intake valves on the opposite side from exhaust vales, a DOHC engine can "breathe" better, meaning that it can produce more horsepower with smaller engine volume. Compare: The 3.5-liter V6 DOHC engine of 2003 Nissan Pathfinder has 240 hp, similar to 245 hp of the 5.9-liter V8 OHV engine of 2003 Dodge Durango. Pros: High efficiency, possible to install multiple valves per cylinder and adopt variable timing.Cons: More complex and more expensive design.

• by Vlad Samarin

DOHC or Twin Cam engine

Positive Negative Interesting

Cars don’t leave a mess on the road.

Cars don’t make horse poo but they make a mess by pollution

Car designers want to make cars that don’t make pollution.

Cars go faster and longer distances than horses.

But for a car to do that you need some oil.

People dig miles under ground to get oil.

Cars are more indestructible than horses

But then you have to dig up a hole lot of rock and compress it.

There is nothing good about pollution.

• For a awesome time line go to http://www.yourdiscovery.com/cars/timeline/ click on the link

• “click on me’’. Said the link.

Future cars

• In the future designers hope to make cars that won’t make pollution.

Rev list

• Wiki

• Google images

• Everydayquestions.com

• samarins.com