Tipo 6CM - 1936-1939
Built to replace the 4CM, now struggling against competition from cars such as the ERA, the 6CM boasted an all-new in-line six-cylinder engine that was to prove itself very reliable indeed. The chassis was the fruit of lessons learned during the development of the 8VRI, of which only the best features were retained.
The independent suspension was retained on the front wheels, but there was a return to the solid axle for the rear as it was more reliable. The bodywork had very nicely designed aerodynamics and the results were soon speaking for themselves. Later developments made to the car involved the engine, chassis, bodywork and suspension, and ensured that the single-seater remained competitive until 1939.
Technical data
| 0-60 mph | |
| Bodywork | aluminium-bodied single seater |
| Bore and stroke | 65x75 mm |
| Brakes | hydraulic drum brakes on the wheels |
| Brakes front | |
| Brakes rear | |
| Chassis | ladder frame, with two longitudinal steel girders and cross members |
| Compression ratio | 6:1 |
| Cooling system | water-cooled, centrifugal pump |
| Displacements (unitary) | |
| Dry weight | 1,433 lbs (650 kg) |
| Engine | vertical in-line 6 |
| Engine weight | |
| First race | 1936 Circuito di Modena |
| Front Tyres | |
| Front suspension | torsion bars, friction dampers |
| Front track | |
| Fuel & lubricant | |
| Fuel feed | Roots supercharger, a single Weber 55AS1 (55-50DCO) carburettor mounted ahead of the supercharger |
| Fuel tank | 26.40 Imp. gall. (120 litres) |
| Gear ratios | |
| Height | 47.24 in. (1,200 mm) |
| Ignition | single-plug, Scintilla magneto |
| Kerb weight | |
| Length | 146.45 in. (3,720 mm) |
| Length-Width-Height | |
| Lubrication | dual oil pumps (pressure and scavenge) |
| Maximum power | 155-175 bhp at 6,200-6,600 rpm |
| Maximum torque | |
| Model | 6CM |
| One mile | |
| Production dates | 1936-1939 |
| Production start | 1936 |
| Quarter mile | |
| Rear Tyres | |
| Rear suspension | leaf springs and friction dampers |
| Rear track | |
| Reduction | |
| Steering | worm gear |
| Timing gear | two valves per cylinder set in a 90°V, twin overhead camshafts |
| Top speed | 130-143 mph (210-230 km/h) |
| Total displacement | 1,493.2 cc |
| Transmission | 4-speed + reverse |
| Tyres | front 6.00x16-5.25x17; rear 6.00x16-5.25x17; Pirelli |
| Weight distribution | |
| Wheelbase | 98.03 in. (2,490 mm) |
| Wheels | wire wheels, 4.00x16 - 4.00x17 |
| Width | 58.27 in. (1,480 mm) |

