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The DB 2/4 Mark III (normally simply called DB Mark III, even at the time of its introduction) is a sports car sold by Aston Martin from 1957 until 1959. It was an evolution of the DB2/4 Mark II model it replaced, using an evolution of that car's W.O. Bentley-designed ''Lagonda'' 2.9 L (2922 cc/178 in³) straight-6 engine, redesigned by Tadek Marek. ==Overview== Changes included the front grille, that would become the shape of all future Aston Martin models, a new instrument panel, and available Girling disc brakes. The hydraulically operated clutch was new as well, and an optional Laycock-de Normanville overdrive that was attached to the STD 4 speed gearbox after the 1st 100 cars or even an automatic transmission were available. Worm-and-sector steering and a live axle rear end were carry overs. At the rear, the DB2/4 Mark II's tailfins (after the 1st few early cars) were altered to use the rear lights from the Humber Hawk. The standard ''DBA'' engine model with twin SU carburettors produced 162 hp (121 kW), though an optional dual-exhaust system (a claimed 16 b.h.p. increase) raised this to a reputed 178 hp (133 kW). Thus equipped, the car could reach 60 mph (97 km/h) in 9.3 seconds and hit 120 mph (193 km/h). An optional high-output ''DBB'' engine with three twin-choke Weber 35 DCO 3 carburettors, special long duration camshafts, high compression 8.6:1 pistons and the dual-exhaust system boasted 195 hp (145 kW), though this was rarer ( 10 cars thus equipped) than the mid-level ''DBD'' option with triple SU 1.75" carbs and 180 hp (134 kW) also with the dual exhaust system, fitted to 47 cars. The DB2/4 "hatchback" models are often referred to as "the ugly duckling's." The Mk 3 being the last of the ugly ducklings; though when seen in person, few people will describe the car as ugly. In fact, most people agree the car is quite good looking in person, especially in comparison to the rather dowdy look in most photographs. One car was fitted with the special ''DBC'' competition engine with a reputed 214 b.h.p., this was fitted with racing camshafts, special connecting rods, very high compression pistons (possibly 9.5:1) & three twin-choke Weber 45 DCO 3 carburettors. Girling disc brakes were fitted as standard to the front wheels of all MkIII Astons after the first 100 had been made. Many cars were upgraded later. Only five automatic cars were made from a total of 551. A 1959 review by ''Road & Track'' magazine praised the car for everything but its $7,450 price. "A car for connoisseurs," they called it. "The Aston has many virtues and few faults." Among the faults was too-heavy steering effort, high door sills, and a stiff ride. Interestingly, ''R&T'' failed to comment at all on the car's innovative hatchback body style, complete with fold-down rear seats, although this had been first introduced in the 2/4 MkI in 1953. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Aston Martin DB Mark III」の詳細全文を読む スポンサード リンク
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