Tipo 308 derived from P3/8C2900 ,done Tipo 312 (derived from 12C 37 experimental car) 3 litre class V12 (1938) started Tipo 316 (16 cylinder, 12C 37 chassis) 3 litre class U16 (1938-1939) started Tipo 162 (16 cyl, 3 litre) 1939 (tipo 163 prototype) V16 (1940) Tipo 512 (flat -12) 1940 done
Tipo 412 12-cyl 4500cc 1939 8C2900B chassis, un-supercharged , needs more info about this version...