|

Following the successful use of front wheel drive for
racing, Alvis produced road cars using this system, the first manufacturer
of any size to do so. This was an incredibly courageous move because the
technology involved was radical and difficult. The cars met with a fair
degree of success initially, but then sales fell off, it has been said due
to opposition from the insurance companies because of the cars'
unconventional design. (Third party insurance became compulsory in the UK
in 1928.) Sales also dropped because they appealed to a limited and
volatile market segment, that for high-performance sports cars. The FWD
cars were rather noisy, complex and required owners to learn different
driving techniques from those then regarded as normal, to extract the best
from them.

1929 FE FWD superchaged Carbodies fabric tourer
This does not prevent them from being much sought after
today; they are fast, good-looking and spectacular cars. Technically, the
FWD was extremely interesting, featuring a gear driven overhead camshaft,
inboard front brakes and all-independent suspension in addition to the
front wheel drive. Cylinder dimensions were 68x102mm, 1482 cc, the four
cylinder engine was turned back-to-front to drive through a 4 speed
gearbox and substantial non-constant velocity joints. These latter
resulted in some "fight" at the steering wheel when cornering. A
conventional right hand gear change lever was used, in contrast to many
other early and some later fwd cars where the gear lever migrated to the
dashboard. One could argue that the car was the start of the 'Mini' as
Alex Issigonis, its designer worked at Alvis during this period.

1928 FWD at Brooklands
Front suspension was by four
transverse quarter elliptic springs on each side, whilst at the rear
single longitudinal reversed quarter elliptics operated in conjunction
with rear-hung radius arms. Many were fitted with superchargers; this
instrument increased power from 50 bhp to 75. Two chassis lengths,
8'6" and 10', were available, for two or four seater open coachwork,
although some saloons were also made. The short chassis types were FA
and FD FWD, the long ones FB and FE. FC referred to a few special
racing versions with fixed cylinder heads. An eight-cylinder model,
based on the contemporary racing cars, featuring twin overhead
camshafts and supercharger, was also listed. About a dozen were made,
and the straight eight FWD is now the Holy Grail of Alvises. One
racing version survives, although the four cylinder models are
surprisingly numerous. Production of the FWD totalled some 150 cars.

Leon Cushman on the straight eight
FWD in the very wet 1929 Ulster TT
|
Wheelbase |
2591 mm |
102
in |
|
|
Track |
front |
1372 mm |
54 in |
|
| rear |
1372 mm |
54 in |
|
|
Length |
3759 mm |
148 in |
|
|
Width |
1753 mm |
69 in |
|
|
Type |
S-4
|
SOHC
8 valves total
2 valves per cylinder |
|
Bore × stroke |
68.00mm × 102.00mm |
|
2.68 in × 4.02 in |
|
Bore/Stroke ratio |
0.67 |
|
Displacement |
1482 cc
(90.437 cu in) |
|
Unitary capacity |
370.5 cc/cylinder |
|
Compression ratio |
5.70:1 |
|
Fuel system |
1 So carb |
|
Aspiration |
Normal |
|
Max. output |
50.7 PS (50.0 bhp) (37.3
kW)
@5500 rpm |
|
Coolant |
Water |
|
Specific output |
33.7 bhp/litre |
|
0.55 bhp/cu in |
|
Engine location |
Front |
|
Engine alignment |
Longitudinal |
|
Suspension |
Front |
I.TQE. |
| Rear |
I.QE. |
|
Transmission |
4M |
|
Drive |
FWD |
|
Top gear ratio |
1.00 |
|
Final drive ratio |
4.77 |
|
|
|
|