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Hispano-Suiza H6
aka Type aka here, not up there
Production 1919 - 1933
Class Ultra Luxury car
Body Style how many doors+how many seats+what type of body
Length length - type here
Width Width - type here
Height Height - type here
Wheelbase wheelbase - type here
Weight Weight - you get the point
Transmission 3-speed Manual, RWD
Engine 6.6 litre (6597 cc) straight-6
8.0 litre (7983 cc) straight-6
Power N/A hp @ N/A rpm
N/A lb-ft of torque @ N/A rpm
Similar similar (competition)
Designer Designer (lead designer if it was a team effort)

The Hispano-Suiza H6 was a luxury automobile from the 1920s. Introduced at the 1919 Paris Motor Show<ref name=UltiCarMonza> - Hispano Suiza H6C Monza</ref>, the H6 was produced until 1933.<ref name=AutoZineH6_1919>AutoZine - Hispano-Suiza H6 (1919)</ref> Roughly 2,350 H6, H6B, and H6C cars were produced in total.

The H6 engine featured a straight-six engine inspired by designer Marc Birkigt's work on aircraft engines.<ref name=Conceptcarz22H6B> - 1922 Hispano Suiza H6B</ref> It was an all-aluminium engine displacing 6,597 cubic centimetres (403 cu in).<ref name="Browne118">Browne, T.C. p.118.</ref> Apart from the new overhead camshaft, it was essentially half of Birkigt's aviation V12 design.<ref name=Conceptcarz22H6B /> The seven-bearing<ref name="Browne118" /> crankshaft was milled from a 600 lb (272 kg) steel billet to become a sturdy 35 lb (16 kg) unit,<ref name=UltiCarMonza /> while the block used screwed-in steel liners,<ref name="Browne118" /> and the water passages were enamelled to prevent corrosion.<ref name="Browne119">Browne, T.C. p.119.</ref>

One of the most notable features of the H6 was its brakes. They were light-alloy drums on all four wheels<ref name="Browne119" /> with power-assist<ref name=UltiCarMonza /><ref name=AutoZineH6_1919 /><ref name=Conceptcarz22H6B /> the first in the industry, driven with a special shaft from the transmission. When the car was decelerating, its own momentum drove the brake servo to provide additional power.<ref name=UltiCarMonza /> This technology was later licensed to other manufacturers, including arch-rival Rolls-Royce.<ref name=AutoZineH6_1919 /><ref name=CanadianHispano>CanadianDriver - Hispano-Suiza</ref>

The 1922 H6B was slightly more powerful. An 8.0 litres (488 cu in) (110 by 140 mm (4.3 by 5.5 in)) engine was used in 1924's H6C.<ref name=UltiCarMonza />

The H6 series was replaced in 1933 by the J12, which initially used a 9.5 L (580 cu in) V12 pushrod engine.

See Wikicars' comprehensive Hispano-Suiza H6 Review.

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Special versions

A series of five racing H6Bs with short wheelbases and slightly enlarged engines was built in 1922.<ref name=UltiCarMonza /> These were referred to as "Boulonges", to celebrate the H6's victories at the sports car race at Boulonge.<ref name=UltiCarMonza /><ref name=CanadianHispano /> Woolf Barnato piloted a Boulogne to eight international records, including a 92 mph (148 km/h) average over 300 mi (480 km), at Brooklands in 1924.<ref name="Browne119" />

André Dubonnet entered an H6C Boulogne in the 1924 Targa Florio.<ref name="Browne119_20">Browne, T. C., p.119-20.</ref> Powered by a 7,982 cc (487.1 cu in) straight 6 (estimated to produce 195 hp (145 kW)),<ref name="Browne120">Browne, T. C., p.120.</ref> Dubonnet demanded a maximum weight of 100 lb (45 kg),<ref name="Browne119" /> and the aircraft maker Nieuport-Astra complied with tulipwood strips, fastened to an aluminium frame with thousands of tiny rivets.<ref name="Browne119_20" /> Dubonnet finished the gruelling event without a body failure, and drove home to Naples afterward.<ref name="Browne120" />

A later series of short-wheelbase H6Cs was built, eventually being referred to as "Monzas".<ref name=UltiCarMonza />

A six-wheeled H6 was purchased by motion picture director D. W. Griffith.<ref name=Forney6>Forney Museum of Transportation - 1923 Hispano Suiza Victoria Town Car</ref>

Specifications: 1924 H6C Dubonnet Boulogne Targa Florio speedster

  • Length: 5,537 mm (218.0 in)
  • Width: 1,791 mm (70.5 in)
  • Height
    • cowl: 1,245 mm (49.0 in)
    • windshield: 1,524 mm (60.0 in)
  • Wheelbase: 3,378 mm (133.0 in)
  • Wheels: 508 mm (20.0 in) center-locking
  • Weight: 1,583 kg (3,490 lb)
  • Transmission: three-speed manual
  • Suspension:
    • Front: beam
    • Rear: live axle, semi-elliptic leaf spring
  • Engine: Hispano-Suiza straight 6
    • Bore: 110 mm (4.3 in)
    • Stroke: 140 mm (5.5 in)
    • Displacement: 7,982 cc (487 cu in)
    • Maximum power: 195 hp (145 kW) at 3000 rpm (estimated)<ref name="Browne120" />


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