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Bentley 6.5 litre & Speed 6 (1926 -1930)


 

W.O. Bentley's answer to the demand for a car of bigger dimensions especially capable to carry heavy coachwork without significant loss of acceleration and top speed was unveiled in 1926 in the form of the Bentley 6 1/2 Litre. Its six cylinder engine with four valves per cylinder was so powerful that it met diversity of requirements. No longer suffered cars with formal heavy coachwork from lack of performance whereas lighter cars with open tourer bodies were employed on race courses with outstanding success. Introduction in October 1928 of the Bentley Speed Six was logical step to provide customers with a contender for motor sport events.

Nos. made:

363
182
545
 
Bentley 6 Litre
Bentley Speed Six
Bentley 6 Litre altogether
 
Speed Six
Wheelbase 3353 mm 132 in  
Length 4420 mm 174 in  
Width 1740 mm 68.5 in  
Kerb weight 2134 kg 4705 lb  
Type S-6
SOHC
12 valves total
2 valves per cylinder
Construction  
Bore stroke 100.00mm 140.00mm
3.94 in 5.51 in
Bore/Stroke ratio 0.71
Displacement 6597 cc
(402.574 cu in)
Unitary capacity 1099.5 cc/cylinder
Compression ratio 5.30:1
Fuel system 2 SU carbs
Aspiration Normal
Max. output 182.5 PS (180.0 bhp) (134.2 kW)
@3500 rpm
Coolant Water
Specific output 27.3 bhp/litre
0.45 bhp/cu in
performance
Note: A value of -1 means that
the car cannot attain that speed.
0-100mph -1.00s
Top speed 135 km/h
Power-to-weight 84.35 bhp/ton
chassis
Engine location Front
Engine alignment Longitudinal
Drive RWD
Top gear ratio 1.00
Final drive ratio 3.84