Fuel injection could have strengthened early British naval fighters

How might late-1930s British naval fighters have performed if fuel-injection development had continued?

Probably much better, potentially with 300-400 more horsepower early in the war, although the result depends on successful engine development.

British naval fighters could have performed better if the Air Ministry had continued developing fuel-injected engines. The exact gain depends on how successfully the technology matured. A rough estimate is an additional 300-400 horsepower at the beginning of the war. Because British engines remained competitive despite this handicap, removing it could have produced markedly stronger carrier aircraft rather than merely a marginal improvement.