dash cam vs speedometer

schama · February 2019

HI,,ask ko lang po,I have a new car (1 year na po) then I bought a dashcam but the problem is when my car is running 100 kph as posted in speed limit my dash cam speed registered 90 and I was confused sino ba sa dalawa ang papaniwalaan ko and dash cam ba with a speed on my car or yung speedometer ng car ko..?

fgs · February 2019

@schama

This the Australian regulation imposed since 2007 for new cars:

"The speedo must not indicate a speed less than the vehicle’s true speed or a speed greater than the vehicle’s true speed by an amount more than 10 percent plus 4 km/h."

With the example that you've given, your dashcam could be showing you the true speed while your speedo was configured to indicate a higher speed than the actual which is still within the allowable limits set under the regulation.

My dashcam also shows a lower readings compared to my speedo but the difference is only +2-5 kph