I don't think "purist" is the right word, as cwsqbm suggests, "enthusiast" better captures what you're saying.
The trouble with the word "purist" is who defines "purity"? Does an automotive purist eschew all electronic assistance, wanting nothing but mechanicals between he and the road? Will a purist tolerate fuel injection or is a carburetor the only acceptable solution since it is purely mechanical? What about power assisted steering or brakes, or a fly-by-wire throttle in lieu of a cable?
Enthusiast is definitely the word you want. The enthusiast is appreciative of new automotive technologies that aid in the driving experience. A purist is more exclusionary, looking to get to the bare bones IMHO.