2017 Porsche 911 R

Garson007 said:
This is manual though.

That said I'm in agreement; nothing beats the Turbo.

Absolutely love the look of this car though.

Edit: Just had a look, the top speed isn't far off from the Turbo, but I kinda like all the other luxuries an expensive car would come with. Not so much into "just throw away all extra weight" shtick.
Click to expand...

Top speed, sure. 0-100 is 1 second slower than the turbo s, thats massive. Turbo S also has all the luxuries.
 
Hey....same App as me

It's the best Instagram experience on the iPad

c49cfe3139b477a55efc4598fee474ae.jpg


Like that retro yet modern chic interior...
 
Garson007 said:
Edit: Just had a look, the top speed isn't far off from the Turbo, but I kinda like all the other luxuries an expensive car would come with. Not so much into "just throw away all extra weight" shtick.
Click to expand...


top speed is governed by the gearbox, diff ratios, wheel size etc, not really by the amount of power

the power/torque difference is felt in the acceleration, basically how quickly you get to your top speed, the turbo would do so faster
 
saturnz said:
top speed is governed by the gearbox, diff ratios, wheel size etc, not really by the amount of power

the power/torque difference is felt in the acceleration, basically how quickly you get to your top speed, the turbo would do so faster
Click to expand...
Gearbox, diff ratios, wheel size etc only affect the amount of torque delivered to the wheels. On a flat road, if that torque is enough to overcome the loss of energy from mechanical and aerodynamic drag then you go faster.

Mechanical drag is a linear effect, double the speed, double the drag. Aerodynamic drag on the other hand is non-linear. If you double the speed, the drag quadruples. So you very rapidly hit a point where you need huge power increases to go faster.

Topspeed is thus all about aerodynamics and power. The gearing etc just stops the engine from exploding.
 
Pox said:
Gearbox, diff ratios, wheel size etc only affect the amount of torque delivered to the wheels. On a flat road, if that torque is enough to overcome the loss of energy from mechanical and aerodynamic drag then you go faster.

Mechanical drag is a linear effect, double the speed, double the drag. Aerodynamic drag on the other hand is non-linear. If you double the speed, the drag quadruples. So you very rapidly hit a point where you need huge power increases to go faster.

Topspeed is thus all about aerodynamics and power. The gearing etc just stops the engine from exploding.
Click to expand...


my point being that these two cars basically have the same gearbox ratios (final drive), wheels, diff ratios etc, the only difference is the power, thats why the cars have similiar top speeds

the difference in performance comes from the power and torque and is expressed in the acceleration
 
saturnz said:
my point being that these two cars basically have the same gearbox, wheels diff ratios etc, the only difference is the power, thats why the cars have similiar top speeds

the difference in performance comes from the power and torque and is expressed in the acceleration
Click to expand...
Erm, you literally said in your previous post that the top speed is determined by the gearbox etc and not the power. Now you say power.
Please pick one?
 
Pox said:
Erm, you literally said in your previous post that the top speed is determined by the gearbox etc and not the power. Now you say power.
Please pick one?
Click to expand...

what?

where did I say top speed is governed by power?


they have the same top speeds because of gearbox, etc

the turbo car reaches the top speed sooner because of higher power/torque figures
 
saturnz said:
what?

where did I say top speed is governed by power?


they have the same top speeds because of gearbox, etc

the turbo car reaches the top speed sooner because of higher power/torque figures
Click to expand...
Apologies. I read that wrong. You said they have similar top speeds because of the same gearing etc and not the power.

Which is wrong, especially if they have the same/similar drive train. Then aerodynamic drag vs power would have the most effect on top speed.

Ie. Drag vs power gives you top speed.
 
Pox said:
Apologies. I read that wrong. You said they have similar top speeds because of the same gearing etc and not the power.

Which is wrong, especially if they have the same/similar drive train. Then aerodynamic drag vs power would have the most effect on top speed.

Ie. Drag vs power gives you top speed.
Click to expand...


yeah but they look similar so their drag is the same, just the power difference which would affect that ratio which you refer to

both cars can also probably physically rev to a certain point, lets say 8000rpm, so at 8000rpm with gear ratios etc the same they would both reach the same top speed even if we account for the drag since both cars have a similar shape.

once again the difference in performance if top speeds are similar would be felt through the acceleration, which is really the point
 
saturnz said:
yeah but they look similar so their drag is the same, just the power difference which would affect that ratio which you refer to

both cars can also probably physically rev to a certain point, lets say 8000rpm, so at 8000rpm with gear ratios etc the same they would both reach the same top speed even if we account for the drag since both cars have a similar shape.

once again the difference in performance if top speeds are similar would be felt through the acceleration, which is really the point
Click to expand...
Similar is not the same. The OP points out that the R has a different aerodynamic design to generate more downforce. It mentions the rear diffuser, so although they look similar, the R has more downforce. Which means more drag. Which means it needs more power to go the same speed as the standard car.

Which is why even tho it has more power, the top speed is still close.
 
Pox said:
Similar is not the same. The OP points out that the R has a different aerodynamic design to generate more downforce. It mentions the rear diffuser, so although they look similar, the R has more downforce. Which means more drag. Which means it needs more power to go the same speed as the standard car.

Which is why even tho it has more power, the top speed is still close.
Click to expand...

yeah I think we are always going to disagree

I base my reasoning on this

http://www.catherineandken.co.uk/sti/tyres.html
 
You must log in or register to reply here.
Back
Top
Sign up to the MyBroadband newsletter
X