Romain Grosjean tested the original car for three races while Kevin Magnussen continued to drive the new version, but Steiner said the pair will use the same specification for the rest of the year:

We left the door open but it will be almost a hybrid. It won’t be completely the old car coming back, it will be a hybrid. What we found out with that car, how it is working aerodynamically, we can introduce some of those parts on this car for Sochi. That is the status and the car stays the same now.

But if one does it the other one does it. It will not be a comparison any more. We got that one figured out.