new V8 engine, the cars were initially built up around the older, inline 4-cylinder FPF engine.

The Mk4 had its first outing in the non-Championship 1962 Brussels Grand Prix where it qualified in the midfield but failed to finish. Its first World Championship race was the 1962 Dutch Grand Prix. By now the cars were fitted with the more powerful Climax FWMV V8 engine; the meeting went somewhat better with John Surtees