The images are in chronological order, so the first image is a selection of initial proposals, and it ends with the final renders.
Click to see larger image^
Overall, the whole project lasted from about February to May 2014.
Here are couple photos of the 1/4 Scale clay model, credit goes to Tom Plester for the photos, and of course the group who made the model itself, along with the 3D cad model and renders. interior sketches/renders, and the whole presentation board.
My contribution was only the vehicle exterior design, and all the sketches and renders.