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Alvis Speed 20 - 1932-1936
The alvis speed 20, a fast, good-looking and smooth-running touring car, was the cheapest car of its kind on the market. And in 1934 it became the first british car with an all-synchromesh transmission and independent front suspension by a single-transverse leaf spring.
Top speed of more than 85 mph
engine typedrivetrain: Overhead-cam, in-line 6-cylinder
displacement 2,5112,762 cc (2.52.8 l) power rating 87 hp for the smaller engine transmission 4-speed manual
chassis: Originally semielliptic leaf-spring suspension, replaced by a front transverse leaf spring and rear shock absorbers; 2,912-3,528 lbs.
Big six-cylinder engine
designed and built in only three months by george thomas smith-clarke, alviss chief engineer and works manager, the speed 20 was given the six-cylinder engine of the earlier alvis silver eagle, made more powerful with larger ports and a higher compression ratio. When the suspension and transmission were improved, the frame was stiffened by the introduction of a central cruciform crossmember..these change made the lowslung chassis heavier, so a longer-bore version of the engine was adopted in 1935 to raise power output.
the roomy speed 20 bodies were made by outside coachbuilders. A few two-passenger cars were produced, but the rest were four-seat sedans, drophead coupes (convertibles) and sports sedans and tourers, with either two or four
doors. A few speed 20s were built on an extended 132-in. Wheelbase instead of the normal 124 in.
Ideal for fast long-distance motoring, the comfortable, stylish alvis speed 20 was britains cheapest touring car. Shown here is a drophead coupe.
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