Hillman 20

  • Hillman Wizard 75
  • Hillman Twenty 70
  • Hillman Hawk
  • Hillman Seven Seater
  • Hillman 80
Hawk sports tourer
body by Martin Walter manufactured 1936
Overview
ManufacturerHillman Motor Car Co Ltd
Production
  • Wizard 65 & 75: approx. 7000
  • 20/70: approx. 4100
  • Hawk: approx. 5000
  • 80: approx. 300
Model years1931 to 1938
Body and chassis
ClassExecutive car
Body styleWizard 75, 20/70 and Hawk:
  • chassis only
  • family saloon
  • de luxe saloon
  • 4-door sports saloon
  • foursome drophead coupé
  • 5-seater open tourer[1]
LWB 7-seater and 80:
  • chassis only
  • saloon
  • limousine with division
  • landaulette with division[1]
LayoutFR
Powertrain
Engine
  • Wizard 75, 20/70 and 7-seater:
  • 2,810 cc (171 cu in)[2]
  • Hawk and 80:
  • 3,181 cc (194.1 cu in)[3][4]
Transmissionengine, single dry-plate clutch and 4-speed gearbox with central gear lever (all mounted as a unit); open propeller shaft with metal joints; half-floating spiral bevel driven rear axle with banjo case[5]
Dimensions
Wheelbase
  • *Wizard 75
  • 111 in (2,819 mm)
  • track 56 in (1,422 mm)[5]
  • *20/70
  • 108.5 in (2,756 mm)[6]
  • track 56 in (1,422 mm)
  • *Hawk
  • 108.5 in (2,756 mm)
  • track
  • F: 58 in (1,473 mm)
  • R: 59.5 in (1,511 mm)[7]
  • *LWB Seven Seater and 80
  • 126 in (3,200 mm)
  • track
  • *Seven seater 56 in (1,422 mm)
  • *80 F: 58 in (1,473 mm)
  • *80 R: 59.5 in (1,511 mm)[7]
Length
  • *Wizard: 166 in (4,216 mm) grid up[2]
  • Twenty 70 176 in (4,470 mm)[8]
Width
  • *Wizard: 64 in (1,626 mm)[2]
Kerb weight
  • *Wizard chassis only: 19½ cwt, 2,184 lb (991 kg)[5]
  • *Wizard sports saloon: 30 cwt, 3,360 lb (1,520 kg)[9]
  • *Twenty 70 sports saloon 29½ cwt 3,304 lb (1,499 kg)[10]
  • *Hawk Wingham 33½ cwt 3,752 lb (1,702 kg)
Chronology
PredecessorHillman Vortic
SuccessorHumber Snipe
Hillman 20 horsepower
Overview
ManufacturerHillman Motor Car Co Ltd
Layout
ConfigurationStraight 6-cylinder[5]
Displacement
  • 2,810 cc (171.5 cu in)[5]
  • *3,181 cc (194.1 cu in)
Cylinder bore75 mm (2.95 in)[5]
Piston stroke
  • 106 mm (4.17 in)[5]
  • *120 mm (4.72 in)
Cylinder block materialcast iron; 4-bearing crankshaft; pistons have alloy heads and steel skirts[5]
Cylinder head materialcast iron; detachable, only connection is to radiator[5]
Valvetrainside valves operated by gear-driven camshaft[5]
Compression ratio5.1:1[5]
Combustion
Fuel systemair cleaner, hot spot for mixture, mechanical fuel pump driven from camshaft supplies from rear tank, 4-branch inlet and 3-branch exhaust manifolds[5]
Managementdynamo with water pump driven by chain, coil ignition[5]
Fuel typepetrol[5]
Oil systemforced by pump, oil filter provided[5]
Cooling systemwater pump, thermostat, fan (with adjustable fan belt), honeycomb radiator within V-front shell with chromium plated centre bar[5]
Output
Power output
  • *Wizard 75: 54 bhp (40 kW; 55 PS) @3,400 rpm
  • Tax horsepower 20.9[5]
  • *20/70
  • *Hawk: 75 bhp (56 kW; 76 PS) @3,400 rpm[7]

The Hillman Wizard 75, Hillman Twenty 70, Hillman Hawk and their long wheelbase variants Hillman Seven Seater and Hillman 80 models were a series of 20 horsepower (RAC rating) medium priced 5-7 seater executive cars made by Hillman during the 1930s.

Built at a time when body and chassis were quite separate structures Hillman's 20 horsepower chassis was given three different body shapes in five years and a grand total of five different names if the long wheelbase cars are included. The same body shapes and chassis were used for Hillman's 16 horsepower offering though that smaller engine was not offered with their long wheelbase cars.

Towards the end of the 1930s the badges of the current models were changed by the Rootes brothers to Humber Snipe.

  1. ^ a b Hillman. The Times, Tuesday, Oct 15, 1935; pg. 5; Issue 47195
  2. ^ a b c British Car For "The World". The Times, Tuesday, Apr 28, 1931; pg. 13; Issue 45808
  3. ^ Cars Of 1936. New six-cylinder Hillmans The Times, Friday, Oct 04, 1935; pg. 7; Issue 47186
  4. ^ Courier-Mail, Brisbane (22 March 1937) - Hawk engine size
  5. ^ a b c d e f g h i j k l m n o p q Cars Of To-Day. The Times, Tuesday, Jun 30, 1931; pg. 12; Issue 45862
  6. ^ Sydney Morning Herald (2 June 1936)
  7. ^ a b c Cars Of To-Day. The Times, Wednesday, Jan 15, 1936; pg. 4; Issue 47272
  8. ^ Culshaw and Horrobin (1974). Complete Catalogue of British Cars London: Macmillan. ISBN 0-333-16689-2.
  9. ^ Cite error: The named reference TT46493 was invoked but never defined (see the help page).
  10. ^ Cars Of To-Day. The Times, Wednesday, Jun 05, 1935; pg. 11; Issue 47082.