RE: World's First Test of Dodge's Newest Muscle Car
In the Edmunds road test article, they remarked that "both the 1970 426 Hemi and the 2008 370 c.i. Hemi are rated at 425 hp. But the 08 car is 647 lbs. heavier (at 4,189 lbs.). As 1/4 mile speeds of these cars are almost purely a function of horsepower-to-weight ratio, you have to wonder which horsepower rating is fiction."
I plugged the 2008's weight (4,189 lbs.) and flywheel horsepower (425) into a 1/4 mile ET calculator. I got 13.2 sec. The Edmunds article cited 13.3 sec. Close enough.
If you input 425 hp and 3,542 lbs. for the 1970 Hemi you get 12.4 sec. Too fast. To get the same ET as the 2008 Hemi, you have to input 350 flywheel horsepower.
This roughly shows that the 2008 Hemi is making more horsepower at the flywheel, as compared to the 1970 street Hemi.
1/4 Mile ET Calculator