2020-2021 Technical Regulation Guidelines 
The ACO and FIA laid out their roadmap for the 2020-2021 regulations, and as expected have mandated hybrid systems for privateers as well as manufacturers.
The headlines of these 2020-2021 regulations are that the budgets will be reduced to a quarter of what was spent by hybrid manufacturers this year, that the cockpit will be bigger, and safer with a revised upright seating position, that the weight limit will be 980kg (with weight distribution capped as it is in Formula 1) and that the engine design will be free.
The target power from the engine will be 520kW and from the hybrid system a further 200kW, amounting to 720kW in total, and lap times will be targeted around Le Mans at 3m20s, with the help of moveable aerodynamic devices. However the devil is in the detail; the hybrid system can be developed by a manufacturer and must be made available for lease to a privateer, although what constitutes the hybrid system was not defined. Does it include software, and trackside support staff, for example"
The ACO announced their guidelines for the 2020-2021 ‘Hypercar’ regulations at Le Mans. Credit: Joao Filipe
The engines will have their minimum size, weight and centre of gravity defined, which will effectively dictate what architecture would be optimal. And, key to all of it is the plan to reduce the budgets for a manufacturer, while increasing the cost to a privateer by a factor of three. 
The aero concept w...