1989 · TECHNICAL
1989 Technical Regulations
1989 delivered the turbo ban that had been signalled since 1986. All engines had to be naturally-aspirated and displace no more than 3.5 litres. Manufacturers chose between V8 (Cosworth DFR, Judd CV), V10 (Honda RA109E, Renault RS1) and V12 (Ferrari 035/5, Lamborghini) configurations. No fuel consumption limit applied because the atmospheric output made one unnecessary. Minimum weight with driver was 505 kg. Alain Prost beat teammate Ayrton Senna to the title in a notoriously tense McLaren season; the two collided at Suzuka in a move that remains one of F1's most-discussed incidents.
Turbo ban — atmospheric 3.5L era begins
Turbochargers became illegal. Only naturally-aspirated engines up to 3.5 litres of swept volume were permitted. Manufacturers converged on V8 (reliable, compact, cheap), V10 (eventually dominant for power-to-weight) and V12 (highest peak power but heaviest). The V10 emerged as the optimum configuration over the next few years and eventually became the mandatory format in 2000-2005. No fuel-consumption cap was needed because atmospheric thermodynamics produced self-limiting efficiency.
Key changes
- Turbochargers banned entirely.
- 3.5L naturally-aspirated engines mandatory.
- No fuel-consumption limit.
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.