Braking distances

[Gaygle]

I was just wondering if there was any websites out there that showed actual braking distances of different cars at different speeds (tried google but not much came up). I somehow don't believe that at 30mph it takes 12 meters braking distance (ex. thinking).

cheers

 

[Trifid]

I can find 70 to 0 braking distances in the Top Gear mag. The Ford 2 Max requires 82.7m to come to a stop. I believe some guy said that *2 the speed and square root the stopping distance?

Edit: Thinking back on it, it was height and into a sand pit.

 

[The_Dark_Side]

I was just wondering if there was any websites out there that showed actual braking distances of different cars at different speeds (tried google but not much came up). I somehow don't believe that at 30mph it takes 12 meters braking distance (ex. thinking).

cheers

it's meant as a guide and, in my opinion, it's a good thing that the figures are higher than actual.
otherwise you'd get morons driving even closer to the car in front armed with the knowledge " i can stop quicker than that"

 

[saitrix]

New Clio
30-0 = 9.4m
70-0 = 49.5m

New Swift
30-0 = 8.8m
70-0 = 48.1m

Just a few I know, got some more which I will post later.

Edit...

Impreza WRX STI Spec D
30-0 = 7.9m
70-0 = 44.3m

BMW 330d SE
30-0 = 8.7m
70-0 = 46.8m

Mazda 6 MPS
30-0 = 8.6m
70-0 = 45.1m

Ford S-Max 2.0 TDCI LX
30-0 = 9.2m
70-0 = 49.9m

 

[Tax Evader]

I'd expect an Impreza to be better than that!

My CSL does 70-0 in 34m

 

[The_Dark_Side]

I'd expect an Impreza to be better than that!

My CSL does 70-0 in 34m

4wd will probably be working against it.
the engine is still trying to drive all 4 wheels.
aside from weight issues this is another good reason why "cars" like Shoguns don't stop well.

 

[Lashout_UK]

the engine is still trying to drive all 4 wheels.

I don't follow this? If you're testing braking distances, what difference does that make.

If anything, 4WD would mean engine braking could be distributed across 4 wheels, so it might actually help. (I.E, if you were doing emergency stops from those speeds)

 

[cyclopopcicle]

the braking distances in the highway code are based on "NORMAL" braking conditions "NOT" emergency stops as that will allways be lower a figure

 

[Dolph]

More to the point, the distances in the highway code haven't been updated since the days of drum brakes all around and crossply tyres...

As to the 4wd thing, the engine braking effect is not generally an issue in higher gears, so the fact they are still driven is more likely to be a negative than a positive.

 

[The_Dark_Side]

As to the 4wd thing, the engine braking effect is not generally an issue in higher gears, so the fact they are still driven is more likely to be a negative than a positive.

you've put the point over better than i did, thanks.

the example that came to mind is the Sierra.
XR4i...rear drum brakes.
XR4x4i (essentially the same car bar 4wd and the obvious 5 door bodyshell)..rear disc brakes.

as you said the engine braking isn't great on a 2wd car, divide it in half by adding another 2 driven wheels and it pales in comparison to the force the engine is exerting to keep the wheels spinning.

 

[The_Dark_Side]

More to the point, the distances in the highway code haven't been updated since the days of drum brakes all around and crossply tyres...

very true, but wouldn't you rather a guide was erring on the side of caution as opposed to being much more accurate?
this would only encourage some drivers to take more risks as they'd have had shorter braking distances drummed into them during their tuition.

 

[vanpeebles]

the distances might be old but its still same old muppets behind the wheel as well

 

[The_Dark_Side]

the distances might be old but its still same old muppets behind the wheel as well

you're not wrong as usual mr.van sir.

i'm still unsure what i really think about that prototype Merc with the parking sensors that double as braking distance sensors.get too close and they MAKE you back off.

hmm.

 

[TheDogFather]

Would not the biggest variable in braking distance be the road surface ?

TDF.

 

[aztechnology]

4wd will probably be working against it.
the engine is still trying to drive all 4 wheels.
aside from weight issues this is another good reason why "cars" like Shoguns don't stop well.

Surely if you've banged the brakes on and the tyres are on the limits of grip thanks to ABS and discs all round etc., there is very little to be added with engine braking - whatever gear you are in.

 

[The_Dark_Side]

Surely if you've banged the brakes on and the tyres are on the limits of grip thanks to ABS and discs all round etc., there is very little to be added with engine braking - whatever gear you are in.

not a great deal, i was referring to the reasons that 4wd cars that don't always brake as well as their 2wd rivals though.

 

[The_Dark_Side]

Would not the biggest cariable in braking distance be the road surface ?

TDF.

not really because that would be a constant for every other vehicle on a given road.

 

[TheDogFather]

I was thinking in terms of how far it will take to stop, not how quick compared to other cars. I thought the OP meant the same.

TDF.

 

[The_Dark_Side]

I was thinking in terms of how far it will take to stop, not how quick compared to other cars. I thought the OP meant the same.

TDF.

that showed actual braking distances of different cars at different speeds

the fact that the OP said car(S) in plural says to me that he is looking for comparisons.
if i've misunderstood then i apologise.

 

[Fett]

I'd expect an Impreza to be better than that!

My CSL does 70-0 in 34m

You sure thats not 60-0? A blobeye STi from 60 is 111 ft (a smidge under 34m).