Nice answer.Bazil said:It depends:
If my mothers in the car - I'll tell her it reads fast.
If one of my mates is in the car - then you'd be amazed now slowly it reads!!!
I'm not so sure - I think it's natural to assume that as it's a jolly expensive car it's going to have a jolly accurate speedo. But I've heard that Mercedes speedos - until the very recent models - used to regularly read +10% - which is an awful lot!!Enzo250GTO said:I'm guessing pretty damn accurate.
Andy, you're my kind of guy. What I try to have conversations like that with civilians they look at me like I'm crazy.ajengli said:Did a trip upto Birmingham today in my Merc, the sat nav unit was indicating that the speedo was 4-5% out. (When the speedo was reading 90 I was actually doing 86).
I then started to wonder if the amount of tread left on my tyre would have any significant affect on speedo reading. Well....
My Merc has 18" alloys, fitted with 275 35 tyres.
When tyres are new they come with 7mm of tread (I think), the limit (in UK) is 1.6mm.
diameter of wheel in mm = 9*25.4 = 228.6mm
depth of tyre wall = 275 * 0.35 = 96.25mm
max wheel diameter = 228.6 + 96.25 + 7 = 331.85mm
min diameter of wheel = 228.6 + 96.25 + 1.6 = 326.45
With wheel diameter being directly proportional to speed then the difference is (331.85-326.45)/331.85 * 100 = 1.6%!!
Not much really.
I too have a Porsche GT3 and 360 Modena (sold that). But My Stradale will arrive soon. :wink:
I thought about getting a GT3, but can't justify the expense. I drove the M3 for over two years, it's a fast car with flaws. Yes, it was the E46. I've never owned a Porsche, so here goes!adlinyusman said:You traded an M3 for a C2? Was it the E46? Aside from the nominally clunky SMGII upshifts, i think it's a really good car. I've driven it daily for the past week and have clocked up almost 2,500kms. I just can't keep my hands off of it. :green: Haven't driven the C2 so i can't compare. The 911 GT2 on the other hand is frighteningly awesome. Scares the crap outta me. Probably cause it wasn't mine and i wasn't the one driving it.
I have a Ferrari and a Porsche in the garage but the Porsche happens to be an SUV :wink: Then again I live in Switzerland and it does snow often here, especially in the mountains so an SUV is much more sensible than in NY. Coincidentaly the 360 I just bought replaced a C4...thom360 said:
I remember hitchhiking in the mountains of Switzerland in 1971 (I'm 50). We went from Interlaken to Grindelwald and back. We got a ride from a nice family, but the driver was quite drunk. Thankfully we stayed on the road.ddemet said:I have a Ferrari and a Porsche in the garage but the Porsche happens to be an SUV :wink: Then again I live in Switzerland and it does snow often here, especially in the mountains so an SUV is much more sensible than in NY. Coincidentaly the 360 I just bought replaced a C4...thom360 said: