1984 · TECHNICAL
1984 Technical Regulations
1984 introduced two changes that together reshaped the competitive envelope: in-race refuelling was banned (reversing the 1983 re-introduction) and a 220-litre fuel allowance per race was imposed on turbo cars. Atmospheric 3.0-litre cars had no fuel limit. Teams with turbo engines suddenly had to complete race distance on a fixed fuel budget, forcing engine manufacturers to pivot from peak-power chasing to thermal-efficiency R&D. The TAG-Porsche-engined McLaren MP4/2 is the season's archetype — Niki Lauda beat teammate Alain Prost to the title by 0.5 points under this constraint.
Refuelling banned
In-race refuelling, which had returned in 1983, was banned from 1984 onwards. Cars had to complete the race on a single tank. The ban remained in force through 1993 before the next refuelling era (1994-2009).
Key changes
- In-race refuelling banned (reversing the 1983 rule).
Turbo 220-litre fuel limit
Turbocharged entries were limited to 220 litres of fuel per race, with no equivalent cap on atmospheric cars. The rule aimed to slow the turbo arms race which was producing qualifying-boost figures north of 1,000 bhp. Manufacturers (Porsche via TAG, BMW, Ferrari, Renault, Honda) responded by investing heavily in fuel-injection efficiency, charge-cooling and combustion-chamber design — technology later transferred to road cars.
Key changes
- 220-litre fuel cap applied to turbo cars only (no cap on atmospheric).
Last updated: 2026-04-24
This summary is editorial material prepared by F1pedia for general F1 audiences. It is not a legal reference. For binding rule text, consult the official FIA document.