[ChargerS.X.T]

I found this formula that works most of the time:

weight of car kilogrammes
0-60 time = ----------------------
maximum bhp of car * 0.9

For example the 3.5L= 3800lbs/2.205= 1723 kg/250x0.9= 7.66 sec

The 5.7L = 4100lbs/2.205= 1859 kg/350x0.9= 5.90 sec

SRT8 = 4200lbs/2.205= 1905/425x0.9= 4.98 sec

 

[metgo]

Another one that works is take half the weight of the car in pounds divided by the engine horsepower. Ex.

Charger:

3.5: (3800/2)/250 = 7.60 seconds
5.7: (4100/2)/340 = 6.03 seconds
6.1: (4200/2)/425 = 4.94 seconds

 

[triplefive]

Sounds good on paper but doesn't really translate to the real world in every case..

 

[TNCHARGER]

Looks close to the average times you see around the forums for the vehicles....both look good for a rule of thumb estimating..