The automobile was pretty well defined over 140 years ago. The most successful examples were four-wheeled, pneumatic-tyred, petrol-fuelled, internal combustion-engined, multi-speed transmission and differential-driven, steering wheel-controlled vehicles. External combustion engines (steam) and electrical propulsion had not yet been discarded, at least for the time being in the case of electric, and shaft drive had not yet replaced chains.
The First World War moved the development of the petrol piston engine forward, and the importance of streamlining to reduce drag was recognised. Circuits became the place to race these automobiles against each other, rather than the open road, to demonstrate the benefits of each concept and configuration.
Competition then became less about proving concepts and more about demonstrating the ability of automobile companies, and indeed countries. Mercedes-Benz came out best, and…