Car sounding like a motorbike

[paddyb]

Noise from my car has always been normal but in the last couple of days it has begun to sound like a motorbike when I drive any faster than 30 mph. When I rev the engine when the car is stationey I don't hear anything out of the ordinary. Anyone have any ideas as what the problem could be.

 

[ford jedi]

if the noise gets louder as you go faster ,could be a wheel bearing.is the noise there when the vehicle is stationary

 

[aircobra19]

Could be a break in an exhaust joint somewhere which only is opened when the engine moves back on its mounts under acceleration.

 

[lissard]

Sounds like the exhaust is cracked.