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Jowett Jupiter

Farina bodied Jupiter

interior of same car

Jowett Jupiter sports cars were built from 1950 to 1954 all of which were powered by a Jowett-designed 1486cc flat four pushrod engine of 60-62BHP in standard form. Most Jupiters constructed were the aluminium-bodied Mk1 (731) and the Mk1a (94). A further 75 fully equipped Jupiter rolling chassis were sold to specialist coachbuilders like Farina, Gebruder Beutler, Ghia Suisse, Richard Mead, Abbott of Farnham, to name but five. The Factory built three sports-racing R1-type Jupiters for the Le Mans 24-hour races of 1951 and 1952 to capitalise on the standard Jupiter's class win at that race in 1950. During 1953 three R4-type Jupiters were designed and built on a quite different chassis to take Jowett into the mid fifties and beyond. Bodywork was to be in a plastic-resin laminate.



Le Mans 24-hour International sports car race
1950 class win (Standard Mk1) - Tom Wisdom, Tommy Wise
1951 class win (Standard Mk1) - Marcel Becquart, Gordon Wilkins
1952 class win (R1) - Marcel Becquart, Gordon Wilkins

RAC-TT International race for standard sports cars, Dundrod Northern Ireland
1951 Class win (Standard Mk1) - Bert Hadley
1951 Class 2nd (Standard Mk1) - Tommy Wise
During the race Tommy Wise was timed at 92.90mph through the measured kilometre

Swiss National race for standard sports cars, Bremgarten
1951 class win (Standard Mk1) - Gurzeler

Queen Catharine Monteur Cup for 1.5 litre sports cars, Watkins Glen USA
1951 Cup Winner (R1) - George Weaver

International British Empire Trophy, Isle of Man

May 1952 a Standard Mk1 Jupiter was the first true production car home in the 1500cc class, at 7th overall.

Governor's Cup, Arizona day of Races USA

May 1953 Standard Mk1 Jupiters first and second in 1500cc class


Monte Carlo International Rally
1951 Class win, 6th overall (Standard Mk1) - Ellison/Robinson
1951 Class 2nd, 10th overall (Standard Mk1) - Wilkins/Baxter
1952 Class 2nd, 5th overall (Farina FHC Jupiter) - Becquart/Ziegler
1953 Class 4th, 36th overall (Grounds FHC Jupiter) - Grounds/Hay

International Rally of Portugal (Lisbon Rally)
1951 Outright winner (Standard Mk1) - Joaquim Filipe Nogueira

Rallye de l'Iseran

1951 National Rallye de l'Iseran. Outright winner Jean Armangaud (Standard Mk1)

Jupiters tried hard in the International Criterion des Alps 1951, 1952 and 1953. In 1951 Armangaud won his class in the Monza speed test on the first day, and on the third day Wise class-won the Falzarego ascent with Armangaud second. On the fifth day Wise class-won the Stelvio ascent with Armangaud third this time.
In 1952 Robinson lost no marks on the first two days before being forced out with brake problems.

Wheelbase 2362 mm 93 in  
Track front 1321 mm 52 in  
rear 1321 mm 52 in  
Length 4343 mm 171 in  
Width 1575 mm 62 in  
Kerb weight 686 kg 1512 lb  
Type S-4
8 valves total
2 valves per cylinder
Bore stroke 72.50mm 90.00mm
2.85 in 3.54 in
Bore/Stroke ratio 0.81
Displacement 1486 cc
(90.681 cu in)
Unitary capacity 371.5 cc/cylinder
Compression ratio 9.25:1
Fuel system 2 Ze carbs
Aspiration Normal
Max. output 71 PS (70.0 bhp) (52.2 kW)
@5000 rpm
Coolant Water
Specific output 47.1 bhp/litre
0.77 bhp/cu in
Top speed 161 km/h
Power-to-weight 102.04 bhp/ton
Engine location Front
Engine alignment Longitudinal
Drive RWD
Top gear ratio 1.00
Final drive ratio 4.10