Power to weight ratio

**mobile S4** · 11-12-2012 10:45 AM

Was reading an article on TT RS http://www.forbes.com/sites/jasonfog...r-to-surprise/

Has interesting stats on power to weight ratios:

TT RS - 9.18

Lamborghini Aventador - 4.96
Porsche 911 - 8.69
Lexus IS-F - 9.09
Porsche Cayman - 11.31
Subaru BR-Z - 13.81
Smart Pure Coupe - 25.83

and (not in article but to keep this relevant)...

our B8 S4 - 11.5

**MrFunk** · 11-12-2012 11:36 AM

Excuse my ignorance. 9.18? How is that translated? What does 9 stand for & 18?

**Schadenfreude** · 11-12-2012 11:40 AM

Originally Posted by MrFunk

Excuse my ignorance. 9.18? How is that translated? What does 9 stand for & 18?

Pounds per horsepower. 9.18 x 360 (I think that's the claimed HP for the TT-RS = 3,304.8.

**2.7taudi** · 11-12-2012 11:51 AM

Originally Posted by MrFunk

Excuse my ignorance. 9.18? How is that translated? What does 9 stand for & 18?

Th lower the better and less weight per horses.
The larger, the heavier.

Sent from my iPhone.

**zcd2.7t** · 11-12-2012 11:51 AM

Originally Posted by mobile S4

...... our B8 S4 - 11.5

It's worth bearing in mind that though the 3.0T is RATED at 333hp (which matches perfectly the 11.5 lbs/hp figure with a weight of 3840 lbs), it actually produces more like 360+hp, making the true figure 10.66 lbs./hp.

As far as I'm aware, Audi is the current leader in underrating their engines' output.... ;-)

**Monsoon** · 11-12-2012 11:56 AM

The pounds/hp chart goes something like this:

over 15 = Not fast enough to be fun
12-15 = Sporty and probably handles well, but not really fast
10-12 = Starting to feel a little shove in the back
8-10 = Fast enough to make no apologies to anybody. Probably all you really need on the street.
6-8 = Current definition of truly fast car
below 6 = Current gen Supercar/Hypercar, silly scary fast, soon to be crashed on You Tube video.
1.5 = F1 car
0.13 = Top Fuel Dragster

**Monsoon** · 11-12-2012 11:58 AM

Originally Posted by zcd2.7t

It's worth bearing in mind that though the 3.0T is RATED at 333hp (which matches perfectly the 11.5 lbs/hp figure with a weight of 3840 lbs), it actually produces more like 360+hp, making the true figure 10.66 lbs./hp.

As far as I'm aware, Audi is the current leader in underrating their engines' output.... ;-)

Nissan plays the underrating game pretty well with the GTR.

**S4charged** · 11-12-2012 12:01 PM

Originally Posted by Monsoon

The pounds/hp chart goes something like this:

over 15 = Not fast enough to be fun
12-15 = Sporty and probably handles well, but not really fast
10-12 = Starting to feel a little shove in the back
8-10 = Fast enough to make no apologies to anybody. Probably all you really need on the street.
6-8 = Current definition of truly fast car
below 6 = Current gen Supercar/Hypercar, silly scary fast, soon to be crashed on You Tube video.
1.5 = F1 car
0.13 = Top Fuel Dragster

I like that chart.

Originally Posted by Monsoon

Nissan plays the underrating game pretty well with the GTR.

True. Each motor is hand built, so each one will dyno different.

a stock pre 2012 dynos at around 430ahwp

on a side note... b8 s4 SC is underated, so is the 03-04 cobra SC... maybe its a supercharger thing

**MrFunk** · 11-12-2012 12:12 PM

So for those that are tuned running about 450hp - that number is more like 8.53? "Fast enough to make no apologies to anybody. Probably all you really need on the street." fast?