Aston Martin DBR4

Only four Aston Martin DBR4s have ever been built. This iconic model was crafted around a DBR1-style chassis with wishbone front suspension, and features a rear three-piece de dion tube located by a watts linkage.

Powered by a 2.5-litre version of the RB6 engine, the DBR4 was tested in 1957 with a view to compete the following year. However, changes to race regulations meant that the DBR4 would remain idle until 1959. Debuting at the Silverstone International Trophy, Roy Salvadori would break the lap record but fail to displace Jack Brabham in his first-placed Cooper.

Despite its fantastic performance at Silverstone, the Aston Martin DBR4 would quickly find itself losing its edge in the face of competition from the new breed of rear-engine Formula 1 cars.