In 1926, General Motors came out with the Pontiac 6-27 -- a 3.0-liter ... with the base LeMans offering either a 215-cubic-inch inline six-cylinder engine capable of producing 140 horsepower ...

As Leno tells it, then-Pontiac boss John DeLorean was a fan of the Jaguar E-Type (which launched in 1961 with a dual overhead cam inline-6) and wanted to build a competitor. While Pontiac did ...

And before you argue that a six-cylinder Pontiac is underpowered compared ... Because while the four-barrel OHC-6 came with 215 horsepower, the 326-cubic-inch (5.3-liter) V8 that was also ...