I've heard the the 4 cylinders have dual turbos.
Well, technically yes, it has 2 turbos, but not like the ecoboost, which also has 2 turbos.
The ecoboost has 2 identical turbos that work in parallel, one for 3 cylinders and the other one for the other 3 cylinders.
The sprinter has a dual stage turbocharging system. It is basically a big turbo and a small turbo that work together for all 4 cylinders. When you are idling both turbos are just sitting there barely turning. Now, when you suddenly press on the gas, a regular turbo takes some time to spool up, so you have the term turbo lag. This is the case with the sprinter's big turbo. It takes some time for it to spool up, but the small turbo spools up incredibly fast and gives the engine that almost instant power off the bat. Now, after a few seconds the big turbo spools up and takes over providing the boost.
If anyone considers buying a sprinter, do yourself a favor and test drive both 4 and 6 cylinders models. The dual stage turbo system and the super smooth 7 speed transmission of the 4 cylinder model wins in my opinion. Not to mention the better fuel economy also.
Sent from my VS995 using Tapatalk