The Packard Six was the first top level luxury platform built by the company to introduce a six-cylinder engine, and was offered in three wheelbase options of , , and . This was the last Packard to use the term "model" in its designation. Officially, the car was first introduced as the Packard Six Series 1-48. The car was described with varying marketing terms such as the Packard Six, the Packard Dominant Six, the Packard 'Six-48', '1248', and the Packard '48'. The '48' designation was assigned to
T-head engines, while the Series 1-38 or '38' designation was used for
L-head engines that used a different valve configuration. The transmission offered three forward gears and was installed at the rear axle. The Six was replaced in 1916 with the
Packard Twin Six and was the only platform manufactured in two wheelbases. Retail price of an Imperial Landaulet 7-passenger sedan was US$6,550 ($ in dollars ). The line consisted of: • 1912: 1-48 (3 wheelbase options) • 1913: 1-38 (3 wheelbase options) • 1913: 2-48 (3 wheelbase options) • 1914: 1-38 (1 wheelbase only) • 1914: 2-38 (1 wheelbase only) • 1914: 3-48 (2 wheelbase options) • 1914: 4-48 (1 wheelbase only) • 1915: 3-38 (1 wheelbase only) • 1915: 5-48 (1 wheelbase only) : 1912-1915 Six "48": T-head, 525 c.i. (8.6L), 62-74 bhp. N.A.C.C./RAC rating 48 HP. : 1913-1915 Six "38": side valve, 415 c.i. (6.8L), 60-65 bhp. N.A.C.C./RAC rating 38 HP. ==Second Generation (1921–1928)==