MPH gauge off by approximately 3% vs GPS
#1
MPH gauge off by approximately 3% vs GPS
Anyone else have this issue? My gauge is off by 2 mph at 80mph and off by 3 mph at 100 mph. The GPS on the phone and radar detector showing the same speed...2 mph slower than the gauge going 80. Stock tires.
Mods: M-tune
Mods: M-tune
#3
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Join Date: Aug 2020
Location: Orange County California
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Yup, it’s “normal” . . . or that’s what Porsche will tell you. When my speed is actually 50 mph (gps), my speedometer is showing 52 mph. 72 mph actual shows as 75 mph on the speedometer. Same with my wife’s BMW. OTOH our EV6 KIA (Electric Car) and my Harley are exactly correct when compared to a gps.
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Smirnoff67 (01-20-2023)
#6
RL Community Team
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#9
Racer
All Porsche cars have a 3-4 mph difference from reality. Keeps you out of jail!
#10
Rennlist Member
Thanks to lawyers and lawsuits, you'll never see a speedometer that reads correctly.
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FloraFauna (01-23-2023)
#13
Advanced
Yes, I have the same offset. My 2019 5 series had the same issue. Interestingly my wife’s Acura RDX is dead nuts on.
I have been too lazy to check but does the off speed translate to a corresponding error in distance travelled also? If you travelled 1 hour at 80 mph would you have only gone 77 miles?
I have been too lazy to check but does the off speed translate to a corresponding error in distance travelled also? If you travelled 1 hour at 80 mph would you have only gone 77 miles?
#14
Same here
if speedo reads 80, I’m actually going 77.
I don’t mind it.
passed tons of cops in 65 zone
wondered why I wasn’t getting pulled over
now I know
if speedo reads 80, I’m actually going 77.
I don’t mind it.
passed tons of cops in 65 zone
wondered why I wasn’t getting pulled over
now I know