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... H E CHASSI S. A t even the fastest speeds, the ASTON MARTIN holds the road and responds perfectly to the d rive r ’s w ill. The secret is in the chassis frame, a unique design of squaresection fabricated steel tube, w ith builtup side members giving maximum rig id ity but perm itting softer springing than is possible w ith most highspeed cars. T H E S U S P E N S I O N . To achieve maximum com fort at high speeds, the designers of the ASTON MARTIN have used coil springs all round. Front suspension is fu lly independent, w ith the wheels mounted on tra iling arms, a torsion bar being incorporated to prevent ro lling on corners. The rear coil springs are set between the axle casing and the chassis frame, torque being taken by arms extending from the axle to a crossmember. T H E E N G I N E . O f advanced design, the new ASTON MARTIN 4-cylinder o.h.v. engine develops 90 b.h.p. at 4,750 r.p.m. A unique feature is the valve gear ; the large in le t valves are located d irectly above the pistons, w h ils t the exhaust valves are set at an angle, the tappets form ing a detachable assembly in one block. T H E G E A R B O X . Vital firs t stage of the transmission system, the 4-speed gearbox, w ith synchromesh in the three upper ratios gives a clean change every time. It is specially bu ilt by David Brown’s, sufficient guarantee of years of troub le free gear changing. ...
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Aston MartinDB1 (1949) Aston MartinTwo Litre Sports (1949)