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Speedometer/odometer accuracy - Page 1 - Porsche General - PistonHeads UK

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YOUR RESEARCHSpeedometer/odometer accuracy - Page 1 - Porsche General - PistonHeads UK

Leading reported evidence

Check accuracy of the speedometer and odometer

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Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion · Original poster
Anyone else ever checked the accuracy of the speedometer and odometer using GPS?
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Speedometer/odometer accuracy - Page 1 - Porsche General - PistonHeads UK

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Leading evidence: 'Check accuracy of the speedometer and odometer' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check accuracy of the speedometer and odometer' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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1 matching discussions · 4 captured posts examined · 1 partial discussions

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Use gps

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
Anyone else ever checked the accuracy of the speedometer and odometer using GPS?
Original post Read captured discussion
Speedometer/odometer accuracy - Page 1 - Porsche General - PistonHeads UK

Frequently discussed actions (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check accuracy of the speedometer and odometer

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
Anyone else ever checked the accuracy of the speedometer and odometer using GPS?
Original post Read captured discussion
Speedometer/odometer accuracy - Page 1 - Porsche General - PistonHeads UK

Use gps

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
Anyone else ever checked the accuracy of the speedometer and odometer using GPS?
Original post Read captured discussion
Speedometer/odometer accuracy - Page 1 - Porsche General - PistonHeads UK

Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

PistonHeads: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

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Generation: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

I also have the same problem with the Ultima. The dials are VDO with the speed being accurate (+/- 0.5mph) at 40, 60, 80mph but the trip is approx 30% out, can't work this out. Also Domster you have been very quite- how were the sheep in Wales

POST 2Original post

I've found another inaccuracy. The manual says there are only 2 seats in the back yet I managed to squeeze in 4 birds on Friday night. Even more odd, leg room never seemed to be compromised

POST 3Original post

Jeez, UV, will you leave those hookers alone? Honestly. One divorce plus annual bonus and you start trying to set a new Guiness World Record re accommodating ladies being accommodated in a Porsche 911 Didn't see any sheep in Wales, bluesatin - they must have been indoors with the welshmen at the time. Nice tunnel on the M4 though, much narrower than Hatfield - pity it's too far for a sortie. Cheers Domster

POST 4 / ORIGINAL POSTEROriginal post

Anyone else ever checked the accuracy of the speedometer and odometer using GPS? I found that at an indicated 80 mph, it is overreading and the real speed is only 75.5 mph. Strangely, the odometer is wrong in the opposite direction. On a 126 mile trip it underread by about 10%, so this means that the car has done 10% more miles than I thought. I will of course retract this statement when I come to p/x it against a turbo at some point

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