Acura Legend Sedan
From Acura press: The Legend is a performance luxury touring sedan with refined front-wheel-drive, a fuel injected, 24-valve, 2.5-liter V-6 engine and a choice of 5-speed manual or 4-speed automatic transmissions.
The overall concept of the Legend was as a functional driver's car that did not depend on unnecessary gimmicks and gadgets. This concept carried into styling where function and taste form the bases of the Legend's design. Its identity is clear and defined by simple yet elegant lines, and the design process itself was carefully coordinated from concept to production to make sure the car was correct in all respects. Special emphasis was put on ergonomics to minimize driver stress and fatigue.
The Legend is aerodynamically efficient with a low drag coefficient a 0.32. Its body is wedge shaped with a low hoodline and angled windshield, flush headlights and bodywork, and minimal overhangs. Its interior is spacious, tastefully appointed, and specifically designed for a high degree of comfort at all road speeds.
The Legend's 2.5-liter V-6 engine is a light and compact high performance powerplant that owes much of its technology to Honda experience in Formula I racing. Its 90? "V" cylinder bore angle and SOHC configuration allow for both substantial power output and the relatively small outer dimensions which are necessary to achieve the low hood line dictated by the Legend's aerodynamic design.
Both the engine block and one-piece cylinder heads are precision die-cast from aluminum alloy, used for its light weight and heat dissipation qualities; the alloy pistons are molybdenum coated to minimize friction. The block has cast iron cylinder liners and is extremely rigid with the centerline of the crankshaft within the oil pan flange.
The main bearing supports use six bolts, four vertical and two horizontal. These "cross bolted" mains are similar to those employed in racing engines. The Legend's crankshaft, as with conventional V-6 crankshafts, has three throws and four main bearings. To overcome the problem of vibration caused by the uneven firing intervals associated with a 90° V-6, the crank pins are offset by 30°. This makes the firing interval an even 120°, resulting in smooth running, especially at idle. To further reduce vibration, the crankshaft is fitted with a dynamic damper.
The cylinder heads are complex, one-piece castings, with no separate cam case. The cams are located within the centerline of the intake valves and actuate self-adjusting, hydraulically damped finger-followers which open the valves. The exhaust valves are actuated with similar followers that transfer motion through a short link to rocker arms that open the valves.