| Voiturette 1.5 litre |
| Design: | Berthon/Railton |
| Engines: | 6 cyl in-line 57.5 * 69.8 mm = 1087 cc 2 valves/cyl, Roots supercharger |
| 6 cyl in-line 57.5 * 95.2 mm = 1488 cc 2 valves/cyl, Roots supercharger 150-175 bhp@6500 rpm |
| 6 cyl in-line 62.7 * 107.0 mm = 1982 cc 2 valves/cyl, Roots supercharger |
| Transmission: | 4 speed gearbox in unit with engine, Armstrong-Siddley pre-selector |
| Chassis: | channel section side members, C type box section |
| Suspension: | front: Semi elliptic leaf springs, friction dampers |
| rear: Semi elliptic leaf springs, friction dampers |
| Dimensions: | wheelbase: 243.8 cm, front track: 133.4 cm, rear track: 121.9 cm |
| Year: | 1934, 4 cars built |
| As ERA B except for: |
| Design: | Berthon/Railton/Porsche |
| Engines: | 6 cyl in-line 57.5 * 95.2mm 1488cc 2 valves/cyl, Roots/vane supercharger |
| 6 cyl in-line ? * ? mm 1750cc 2 valves/cyl, Roots/vane supercharger |
| 6 cyl in-line 62.7 * 107.0mm 1982cc 2 valves/cyl, Roots/vane supercharger |
| Suspension: | front: trailing arms, transverse torision bars, hydraulic dampers |
| rear: semi elliptic leaf springs, hydraulic dampers |
| Year: | 1937, 3 cars rebuilt from B type |
| CHASSIS | OWNER/DRIVER | ENGINE | VICTORIES |
R1A |  |
1934 Works (Mays, Cook)
Trevoux
Works
Cotten
Vallette
1937 Björnstad
1938 Humpries | 1500cc
100mm Roots |
1934:
NUFFIELD TROPHY (HC) Mays
1937:
CIRCUITO DI TORINO Björnstad |
R2A |  |
1934 Works (Mays, Cook)
1936 Embiricos
1938 Pollock | 1100cc/1500cc
100mm Roots
1936: Independent
front suspension |
|
R3A |  |
1934 Works (Mays, Cook)
Fontes
Wisdom/Black
1937 Martin
Bartlett
1938 Hesketh | 1500cc/2000cc
100mm Roots |
1935:
EIFEL GP Mays
1937:
AVUS RENNEN Martin |
R4A |  |
1935 Fairfield
1936 Works (Fairfield)
1938 Wilson | 1100cc/1500cc
100mm Roots |
1935:
NUFFIELD TROPHY (HC) Fairfield
GRAND PRIX DE DIEPPE Fairfield
1937:
SOUTH AFRICAN GP (HC) Fairfield
RAND GP(HC) Fairfield |
R1B |  |
1935 Seaman
1936 Manby-Colegrave
1937 Cotton | 1500cc
100mm Roots |
1935:
COPPA ACERBO Seaman
PRIX DE BERNE Seaman
MASARYKUV OKRUH Seaman |
R2B | 
"ROMULUS" |
1935 Chula ("B Bira") | 1500cc
100mm/120mm Roots |
1936:
COUPE PRINCE RAINIER "B Bira"
JCC INT. TROPHY (HC)"B Bira"
GP DE PICARDIE "B Bira"
GP d´ALBIGEOIS "B Bira"
1937:
INT. LIGHT CAR RACE "B Bira"
LONDON GP "B Bira"
1938:
CORONATION TROPHY "B Bira"
LONDON GP "B Bira" |
R3B |  |
1935 Works (Mays Cook,
Lehaux)
1936 Destroyed | 1100cc /Vane
Later:
1500cc/100mm Roots |
|
R4B
R4C
R4D |  |
1935 Works (Mays, Cook)
1937 upgraded R4C
1938 upgraded R4D
1939 Mays | 1100cc/
1500cc/1750cc/2000cc
120mm Roots/Vane |
1936:
SHELSLEY WALSH (MC) Mays
MOUNTAIN CHAMPIONSHIP Mays
1937:
GRAND PRIX DE PICARDIE Mays
EMPIRE TROPHY Mays
JCC INT TROPHY (HC) Mays
PHOENIX PARK Mays
1938:
GRAND PRIX DE PICARDIE Mays
MOUNTAIN CHAMPIONSHIP Mays |
R5B |
"REMUS" |
1935 Chula ("B Bira")
1938 Rolt | 1500cc
100mm/120mm Roots |
1939:
BRITISH EMPIRE TROPHY (HC) Rolt |
R6B |  |
1936 Benjafield
Briault
1937 Connell
1939 Mrs Hall-Smith
(Hanson) | 1500cc/1600cc
120mm Roots |
1937:
FREDENLOPPET (IR) Connell |
R7B | |
1936 Dobson
(Dobson, Paul) | 1500cc
120mm Roots
Large fuel tank |
|
R8B
R8C | |
1936 Howe
1936 Works (Howe)
1937 upgraded R8C | 1500cc
120mm Roots/Vane |
1938:
GROSVENOR GP (HC) Howe |
R9B |  |
1936 Scribbans
1938 Ansell | 1500cc
120mm Roots |
1936:
NUFFIELD TROPHY (HC) Martin |
R10B | |
1936 Whitehead
(Whitehead, Walker) | 1500cc
120mm Roots |
|
R11B |  |
1936 Tongue
1938 Aitken | 1500cc
Roots |
1936:
CORK GP (HC) Tongue |
R12B
R12C | 
"HANUMAN" |
1936 Works (Mays, Cook,
Fairfield, Dobson)
1937 upgraded R12C
1938 Chula ("B Bira")
1939 crashed - rebuilt
as B type Hanuman II | 1500cc
120mm Roots/Vane |
1937:
CORONATION TROPHY Fairfield
NUFFIELD TROPHY (HC) Fairfield
GP d´ALBIGEOIS Mays/Cook
GRAND PRIX DE BERNE Dobson
JCC 200 MILE RACE Dobson
1938:
CORK GRAND PRIX "B Bira"
NUFFIELD TROPHY (HC) Bira
1939:
NUFFIELD TROPHY "B Bira" |
R14B |  |
1938 Wakefield | 1500cc
Vane |
1938:
JCC 200 MILE RACE Wakefield |
