For the Bristol 406 Longstone Tyres suggests the 185VR16 PIRELLI CINTURATO ™ as an excellent road holding tyre.
Recommended Tyres for Bristol 406
History of the Bristol 406
The Bristol 406 built from 1958-1961 was the last Bristol that would utilise the BMW straight six engine, which though bored out was still underpowered compared to modern engines of the time. It did however feature much improved brakes to its predecessors, with 4 dunlop-built disc brakes as well as rear suspension on a Watts linkage.