How can we not love purpose built hill climb cars ? Check out this all carbon, 900hp, 2.4l BPD Cosworth RS200 from Forge Motorsport.
In 2012 Pikes Peak is all tarmac from start to finish which means more road racing inspired cars compared to the usual rallycross look optimized for gravel and rougher surfaces. It's cool that Forge Motorsport choose a 30 year old Group B Rally Car for their attempt instead of a newer platform. I bet a pimped up Radical would do quite well.