|
Twenty-one and Twenty-five Series III
|
|
Engine
|
| |
Twenty-one
|
Twenty-five
|
|
Number of cylinders
|
6
|
6
|
| Bore mm |
75
|
82
|
| Stroke mm |
110
|
110
|
| Capacity cc |
2916
|
3485
|
| Valves |
side
|
| RAC hp rating |
20.92
|
25.01
|
| CR |
|
| BHP |
|
90.3
|
| at rpm |
|
3800
|
| Coolant |
water
|
| Carburation |
SU
|
|
Dimensions
|
| Wheelbase |
10'1½"
|
| Track |
4’8"
|
| Length |
15'11"
|
16'0"
|
| Width |
5'10"
|
5'10"
|
| Weight cwt |
30½
|
31¾
|
| Front suspension |
half elliptic
|
| Rear suspension |
half elliptic
|
| Axle ratio |
4.54
|
4.45
|
| Tyre size |
600 x 17
|
|
Performance
|
| 0 to 50 mph secs |
|
14.8
|
| standing quarter secs |
|
|
| Fuel consumption mpg |
|
16-20
|
| Maximum speed |
|
77
|
