1933 Alfa Romeo 6C 1900 Gran Turismo

1933 Alfa Romeo 6C 1900 Gran Turismo

The Alfa Romeo 6C 1900 was the final derivative of the original 6C 1500, produced in 197 examples during 1933 as a transitional model, before the new 6C 2300 was introduced the following year. Only built in Gran Turismo guise with a 2,920 mm (115.0 in) wheelbase, the 6C 1900 replaced the corresponding 6C 1750 model. Besides the larger displacement, other notable mechanical changes were aluminium cylinder heads, an improved chassis frame and a new transmission. The same upgrades were applied to the 1933 model 6C 1750 Gran Sport which, together with the 6C 1900, form the sixth series of the 6C. Alfa Romeo offered the 6C 1900 with an in-house 4-door saloon body, while bespoke coachbuilt body styles included 4-seater cabriolets.

The double overhead camshaft, naturally aspirated, straight-six engine was bored out from 66 mm (2.6 in) to 68 mm (2.7 in), bringing displacement to 1,917 cc (117.0 cu in). For the first time on a 6C the cylinder head was aluminium; some engines were also manufactured using an aluminium block with pressed-in steel sleeves in place of the usual cast iron block. With 68 bhp (51 kW) at 4,500 rpm the 6C 1900 could achieve a top speed of 130 km/h (81 mph). The improved chassis frame consisted of fully boxed rails and crossmembers, instead of the 1750's C-shaped sections.] A new four-speed gearbox was fitted, with synchromesh on the two top gears and a freewheel mechanism.