Hispano-Suiza H6
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| Hispano-Suiza H6 | |
|---|---|
 Hispano-Suiza 1924 H6B Million-Guiet Dual-Cowl Phaeton | |
| Overview | |
| Manufacturer | Hispano-Suiza |
| Production | 1919–1933 |
| Assembly | France: Paris (Bois-Colombes factory)[1] |
| Designer | Marc Birkigt |
| Body and chassis | |
| Class | Luxury car |
| Layout | FMR layout |
| Powertrain | |
| Engine | 6597 cc straight-6 7983 cc straight-6 |
| Transmission | 3-speed manual |
| Dimensions | |
| Length | 5,537 mm (218.0 in) |
| Width | 1,791 mm (70.5 in) |
| Curb weight | 1,583 kg (3,490 lb) |
| Chronology | |
| Successor | Hispano-Suiza J12 |
The Hispano-Suiza H6 is a luxury car that was produced by Hispano-Suiza, mostly in France. Introduced at the 1919 Paris Motor Show,[2] the H6 was produced until 1933. Roughly 2,350 H6, H6B, and H6C cars were produced in total.[citation needed]
The H6 engine featured a straight-six engine inspired by designer Marc Birkigt's work on aircraft engines.[3] It was an all-aluminium engine displacing 6,597 cubic centimetres (403 cu in).[4] Apart from the new overhead camshaft, it was essentially half of Birkigt's aviation V12 design.[3] The seven-bearing[4] crankshaft was milled from a 600 lb (272 kg) steel billet to become a sturdy 35 lb (16 kg) unit,[2] while the block used screwed-in steel liners,[4] and the water passages were enamelled to prevent corrosion.[5]
One of the most notable features of the H6 was its brakes. They were light-alloy drums on all four wheels[5] with power-assist[2][3] the first in the industry,[citation needed] driven with a special shaft from the transmission. When the car was decelerating, its own momentum drove the brake servo to provide additional power.[2] This technology was later licensed to other manufacturers, including arch-rival Rolls-Royce.[6]
The 1922 H6B was slightly more powerful. An 8.0-litre (488 cu in) (110 by 140 mm (4.3 by 5.5 in)) engine was used in 1924's H6C.[2]
The H6 series was replaced in 1933 by the J12, which initially used a 9.5-litre (580 cu in) V12 pushrod engine.
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