The 340 hp Hemi Ram trucks have been tested in the 7.4 second range 0-60
I think I've seen the 390 hp Ram's tested at as fast as 6.9 seconds.
My guess is, with a good tester behind the wheel, a well broken in engine (at least 3k miles) at sea level and no wind, the 2013's with the 8 speed auto should
do 0-60 in the 6.6 second range.
I've seen the Ecoboost Ford's do it in as little as 6.2 seconds.
I've driven all of them and the Ford is fast off the line.
But as one owner here has said, the new Hemi actually pulls harder than the Ecoboost Ford in the higher rpms (which it should since it has 30 more hp...rated anyway, probably only 10-15 hp really).
But once rolling and at rpms above 4000 rpms, the Hemi seems to (and has been shown in tests) to pull harder than the Ecoboost.
But as we all know, turbos are easy to tune and make big power from, so once tuned the Hemi will have no chance even up top against the Ecoboost.
And I've read that for 2015 (releasing in April or May 2014) will be "the next generation Ecoboost 3.5 with even more power and better fuel economy"
So I won't be surprised to see a 10-15 hp increase and a 1 mpg better gas mileage.
It just doesn't have the sound of a V8