Packard Twelve Fifteenth Series
The Packard Twin Six was produced from 1915 - 1923. The name 'Twin Six' would be revived years later eventually becoming known as the Packard 'Twelve'.
There were 7,746 examples of the Packard Twin Six sold in 1916, its introductory year, with figures increasing to 8,899 in 1917. This was an amazing accomplishment considering the relatively high starting price of $2,600 that these luxury cars demanded.
The V-12 engine was comprised of two six-cylinder cars-iron blocks set at a 60-degree angle and rested atop an aluminum crankcase. It was a side-valve design that displaced a total of 424 cubic-inches and produced 88 horsepower. The pistons were made from lightweight aluminum alloy and there was full pressure lubrication which aided in the longevity of the engine.
The engine, clutch, and gearbox were a single unit and replaced Packard's earlier design of having the transaxle mounted on the rear axle. Packard was one of the first to use this type of drivelines. This setup reduced unsprung weight of the rear axle, improved ride and handling, and provided more reliability and rigidity.
The technological improvements continued for 1917 with Packard introducing a redesigned Twin Six with separate cylinder block and head castings. The aluminum pistons now had two compression rings and an oil scraper. Also, the intake and exhaust manifolds were redesigned. Even with these improvements, the horsepower rated remained at 88, although the rated RPM figure dropped from 3000 to 2600.
By Daniel Vaughan | Nov 2008