Car and Driver previews the 2015 Mustang s550 as one of the 25 cars worth waiting for between 2014-2017. Consistent with most speculation up to date, they believe that the 2015 Mustang will be completely modern in design, dishing its current retro styling. They also believe that the s550 Mustang will receive multiple turbo EcoBoost engines – a 4 cylinder and a V8 5.0L Coyote.