Why does my odometer speed is 120 on my 1987 Grand National and other GN cars are 85.

Asked by Jun 24, 2017 at 02:08 PM about the 1987 Buick Regal Coupe RWD

Question type: General

Why does my odometer speed read 120mph on my
1987 Grand National and other 1987 GN cars are
85 mph?

1 Answer

2,600

Back in the days of the 55 mph speed limit, there was a law...see below Speedometers[edit](55) emphasized on a Festiva dashboard 55MPH is emphasized on this dashboard. On October 1, 1980, in a regulation that also regulated speedometer and odometer accuracy, the National Highway Traffic Safety Administration (NHTSA) required speedometers to have special emphasis on the number 55 and a maximum speed of 85 mph (137 km/h). However, on October 19, 1980, NHTSA proposed eliminating speedometer and odometer rules because they were "unlikely to yield significant safety benefits" and "[a] highlighted '55' on a speedometer scale adds little to the information provided to the driver by a roadside speed limit sign."[37][38][39] Sometime around the time your cars were made, the law changed or was about to be changed and some performance vehicles like the GN and Corvette changed the reading on the speedometer to have a higher upper limit. I suspect you are looking at a speedometer built before the change and after.

Your Answer:

Buick Regal Experts

  • #1
    Js08016
    Reputation
    460
  • #2
    Tom Demyan
    Reputation
    440
  • #3
    dvigano
    Reputation
    430
View All

Related Models For Sale

Used Honda Accord
33 Great Deals out of 1,650 listings starting at $3,490
Used Dodge Charger
40 Great Deals out of 920 listings starting at $3,500
Used Chevrolet Camaro
12 Great Deals out of 922 listings starting at $11,500
Used Toyota Camry
27 Great Deals out of 2,102 listings starting at $2,450
Used Nissan Maxima
3 Great Deals out of 337 listings starting at $3,800
Used Ford Mustang
34 Great Deals out of 1,234 listings starting at $4,685

Used Cars For Sale

2017 Buick Regal For Sale
55 listings starting at $21,800
2016 Buick Regal For Sale
18 listings starting at $17,750
2015 Buick Regal For Sale
16 listings starting at $13,933
2014 Buick Regal For Sale
5 listings starting at $16,495
2013 Buick Regal For Sale
2 listings starting at $16,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.