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rdancd816 · 09-19-2007, 10:23 AM

When I do a speed check using my GPS the indicated speed on the speedometer is always about 4MPH faster than what the GPS claims. I have also run the car with my wife pacing and her speedo is also about 4-5 MPH slower. I have heard this is common with Porsche vehicles. Maybe the Autobahn set is trying to keep our speeding tickets down! ??

09-19-2007, 10:23 AM	#4
rdancd816 Registered User Join Date: Dec 2005 Location: Coppell, TX Posts: 317	When I do a speed check using my GPS the indicated speed on the speedometer is always about 4MPH faster than what the GPS claims. I have also run the car with my wife pacing and her speedo is also about 4-5 MPH slower. I have heard this is common with Porsche vehicles. Maybe the Autobahn set is trying to keep our speeding tickets down! ?? __________________ "97 Boxster" Guards Red, Coppell, TX 36,500 miles 2010 Mazda CX-7 AWD, Turbo, Grand Touring