@dms664, @ekdrifter, @saadalex
Speedometer is fine. Car seems to be running fast because Mobile camera lens are wide angle, so things seems more far away then they actually are, so passing an object seems faster due to wide angle lens. When I went to Hyderabad from Karachi on test trial both on PETROL and CNG. Every car had over taken me, including 93 Mehran- even with AC off and Full accelerator pedal on the floor and having 30psi pressure on all tires, a 21 year old Mehran over took me :(.