GPS mph accuracy

[SJEFFB986]

Originally Posted by brjak

My 97 is same. it shows me doing 114KMH when GPS shows 120KMH.

When going slower like 60KMH my gps may read 63KPH

Yep! I confirmed....My 99 boxster shows slower than my GPS. Guess some Boxsters are more special than others..ha ha..

BTW - This morning was frosty and chilly (21 degrees) here in Chester County, Pa. Boxster ran smooth as ice in the cold. I will be driving it in much colder weather in the coming months. Will see how she performs.. The only time I won't be driving her is in rain and snow.

[kk2002s]

Originally Posted by SJEFFB986

BTW - This morning was frosty and chilly (21 degrees) here in Chester County, Pa. Boxster ran smooth as ice in the cold. I will be driving it in much colder weather in the coming months. Will see how she performs.. The only time I won't be driving her is in rain and snow.

I'm basically across the river from you and when I drove my Box during the winter cold weather was never an issue, even single digits. If you have decent tires even snow is not really any worse than any other RWD car

[Joe B]

Originally Posted by SJEFFB986

BTW - This morning was frosty and chilly (21 degrees) here in Chester County, Pa. Boxster ran smooth as ice in the cold. I will be driving it in much colder weather in the coming months. Will see how she performs.. The only time I won't be driving her is in rain and snow.

My 2003 S speedo also reads 3MPH faster than my true speed.

21° F isn't very cold . I've driven mine at well below 0°, no issues. Why should there be; it gets cold in Germany (and Finland), no?