Ford recently released the media pack for the Transit Chassis Cab and Cutaway models. Attached is the media PDF. The 3.7L V-6 standard gas engine and 6 speed transmission moves the big F-150 fairly quick, much quicker than my 5.4L F-150. With the 3.5L EcoBoost and 3.2L Turbo Diesel as more powerful options, Ford appears to have leapfrogged the M-B Sprinter. However, I’m a little concerned about the 10,360 GVWR. The Sprinter-based Solera has an 11,030 GVWR and the cargo capacity is somewhat limited.
Here's a link to the PDF at Ford:
http://www.automotive-fleet.com/fc_resources//transit-chassis-cutaway-callouts.pdf