Hillman 20

Hillman 20 horsepower
Hillman 20 horsepower
Overview
Manufacturer	Hillman
Layout
Configuration	Straight 6-cylinder
Displacement	2,810 cc (171.5 cu in); *3,181 cc (194.1 cu in);
Cylinder bore	75 mm (2.95 in)
Piston stroke	106 mm (4.17 in); *120 mm (4.72 in);
Cylinder block material	cast iron; 4-bearing crankshaft; pistons have alloy heads and steel skirts
Cylinder head material	cast iron; detachable, only connection is to radiator
Valvetrain	side valves operated by gear-driven camshaft
Compression ratio	5.1:1
Combustion
Fuel system	air cleaner, hot spot for mixture, mechanical fuel pump driven from camshaft supplies from rear tank, 4-branch inlet and 3-branch exhaust manifolds
Management	dynamo with water pump driven by chain, coil ignition
Fuel type	petrol
Oil system	forced by pump, oil filter provided
Cooling system	water pump, thermostat, fan (with adjustable fan belt), honeycomb radiator within V-front shell with chromium plated centre bar
Output
Power output	Wizard 75: 54 bhp (40 kW; 55 PS) @3,400 rpm; Tax horsepower 20.9; 20/70; *Hawk: 75 bhp (56 kW; 76 PS) @3,400 rpm;

Hillman Wizard 75
Hillman Twenty 70
Hillman Hawk
Hillman Seven Seater
Hillman 80
Hillman Wizard 75; Hillman Twenty 70; Hillman Hawk; Hillman Seven Seater; Hillman 80;
	Hawk sports tourer; body by Martin Walter manufactured 1936
Overview
Manufacturer	Hillman Motor Car Co Ltd
Production	Wizard 65 & 75 approx 7000; 20/70: approx 4100; 7-seater: approx; Hawk: approx 5000; *80: approx 300;
Model years	1931 to 1938
Body and chassis
Class	Executive car
Body style	Wizard 75, 20/70 and Hawk chassis only; family saloon; de luxe saloon; 4-door sports saloon; foursome drophead coupé; 5-seater open tourer; LWB 7-seater and 80 chassis only; saloon; limousine with division; landaulette with division;
Layout	FR
Powertrain
Engine	Wizard 75, 20/70 and 7-seater; 2,810 cc (171 cu in); Hawk and 80:; 3,181 cc (194.1 cu in);
Transmission	engine, single dry-plate clutch and 4-speed gearbox with central gear lever (all mounted as a unit); open propellor shaft with metal joints; half-floating spiral bevel driven rear axle with banjo case
Dimensions
Wheelbase	Wizard 75; 111 in (2,819 mm); track 56 in (1,422 mm); 20/70 ; 108.5 in (2,756 mm); 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); 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);
Length	*Wizard: 166 in (4,216 mm) grid up; Twenty 70 176 in (4,470 mm);
Width	*Wizard: 64 in (1,626 mm);
Kerb weight	Wizard chassis only: 19½ cwt, 2,184 lb (991 kg); Wizard sports saloon: 30 cwt, 3,360 lb (1,520 kg); Twenty 70 sports saloon 29½ cwt 3,304 lb (1,499 kg); Hawk Wingham 33½ cwt 3,752 lb (1,702 kg);
Chronology
Predecessor	Hillman Vortic
Successor	Humber Snipe

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.

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